32 Auto vs 45 Auto self defense, recoil, and accuracy issues
Posted: Sat Jun 17, 2023 4:05 am
This post refers to the thread started about the New Light Arms CF007 pistol. Several issues came up and it seemed best to address them in a separate thread, rather than to divert the OP's intent in posting on the subject.
I want to address the thread beginning from this point:
viewtopic.php?f=12&t=29081&p=275645#p275638
First of all, I would point out that the use of pistols is somewhat like dentures: one wouldn't offer his dentures to someone else having trouble eating, as one's dentures fit only one's self.
This is not an exact analogy, since dentures are made specifically for one person and guns are not (unless we're talking about target grips made for one person, which would be like dentures), but it is intended to highlight the point that, for many reasons, what handgun works for one person may well not work for another.
For instance, the case has been raised that, for a second follow-up shot, the recoil of the first shot from a 45 Auto pistol would make acquiring the sights for a second shot more difficult than for a similar case with a 32 Auto pistol. I don't think that everyone's experience in this matter would be the same, since we need to consider the size and shape of each person's hands, the size, weight, and configuration of the gun, the gun's action (e.g., blowback or short recoil), and the power of the cartridge in question.
(Here, I'd mention that the comment regarding the greater importance of disabling an attacker with the first shot as opposed to one of being able to successfully place a second shot, because the first one didn't accomplish its task.)
For me, I would have to shoot my CZ70 (32 Auto) back to back with my 1911 (45 ACP) to examine this more closely. However, I almost always shoot the CZ70 with two hands in the isosceles stance (noting that others may use different stances). I almost always have shot my 1911 in the "Bullseye," or one handed stance. (A note about the CZ70: it is very similar in size and weight with a Walther PP.) I'm basing my comparison here on some combat type shooting I did with my 1911 many years ago.
The CZ70 is a "jumpy" little thing in my hands and I don't get nearly as good of a hold on it as I do the 1911, which I consider the best and most comfortable handgun I've shot. Where the short, relatively light CZ70 jumps around in my hands, the 1911 lays in my hand, and due to its weight, length, and the hold I have on it, rolls when fired, compared to the CZ70 jumping.
Several issues are at play here that may not be the same as the experience of others. 32 Auto pistols are almost always blowback actions, and those who have shot shot recoil action 32 Auto pistols, such as the Llama or the Keltec P32, always note those pistols having less recoil than others with a blowback action. So, one factor is what kind of pistol is being shot.
Next, the 1911's long barrel and heavy frame add weight to the end of the gun keep the 1911 pretty stable, where the CZ70's stubby frame and barrel and relative lightness contribute to it being harder to control for me.
Another matter is the way the gun fits the hand. I have a large hand, with moderately long fingers and wide, long palms. There's a lot of "meat" around the grip, in other words. Most folks seem to prefer the "short" 1911 trigger and have difficulty reaching the slide release. I like the long trigger (and so I fitted one to my 1911) and have no problem with the slide release.
The CZ, on the other hand, seems to make me think of wrapping a long string around a small stick. I once had a 25 Auto that really was a problem: I could only get one full finger around the grip under the trigger guard, and the gun jumped around when fired, making it hard to control. The CZ70 is much better in this regard, somewhat like comparing driving a Tata Nano to a Honda Civic, whereas the 1911 is like driving a Bentley.
For me, that is. Now, for anyone else, with different hands and different guns, things might be different or not. The only way to find out is to shoot whatever gun is in question. Those who think that they can find out what works best for them by reading internet prattle, magazine articles, or listening to fantastic stories from members of the Old Stove Society (even if they might be true!) are only kidding themselves.
My point here is that what works for some may not work so well for others.
Another point i'd like to make here is that it sometimes seems to me that folks think of shooting a 1911 in the way they would think of shooting a light rifle in 458 Winchester. I don't think that this is so. I've shot my brother's S&W Model 29 in 44 Magnum, and my own Ruger Blackhawk in 45 Colt, using my very hot handloads. This is a step beyond the 44 magnum. I find the 1911 a pussycat compared to these other two. If one has sent a lot of lead flying down the range, what to expect when the trigger is pulled is different from those with more limited experience. There's no problem with that: the idea of things is to find the gun that fits one's pocketbook and one's ability to shoot it well, not to tell macho stories about how much one has done. But those who suggest that the 1911 might be the next thing to an elephant gun might be making a mistake slightly less wrong than the blowhards who've been everywhere, done it all, and seen everything. Judging these matters is best done with good data, and what works for one is pretty good data.
Regarding effectiveness as a defense round, the 45 Auto beats the 32 Auto fifty ways to Sunday -- nobody can, or should, seriously question this. Where the 32 Auto can barely reach the 305 mm penetration requirement of the FBI when shooting into ballistic gel, the 45 Auto can do this and much more, depending on the bullet used. The 32 Auto ammo should be chosen, if possible, for meeting at least the 305 mm limit. Here, there's a problem: I've never come across anyone running reliable ballistic gel penetration tests of IOF ammo in India.
About all one can do is think about what the performance of IOF ammo might be, compared to other ammo, and take what one can get. If one questions whether IOF 32 Auto ammo can make the 305 mm level of performance (and I'd certainly question that it can), then some thinking should be done about how one uses the gun -- at what range is it effective, and at what targets can it be effectively used against -- when one contemplates carrying.
I will mention that, lest one think that I'm adopting a superior attitude because I have a 1911 (and other handguns, as well), may I point out that I carry my CZ70 in 32 Auto 95% of the time? I recognize that there are limitations to the gun and cartridge, and try to take that into account. I've also recently acquired a large batch of 32 Auto brass, and will begin to cast my own bullets and load my own ammo, and really get down to putting lead downrange with plenty of my own ammo, rather than small quantities of expensive store-bought ammo. I'm trying to work with the best thing I can obtain to make the gun and cartridge work for me. Many here won't have that opportunity, I realize, and I'm very sorry about that. But each of us can do something to improve one's chances of surviving and unfortunate incident.
There's no question that, in military use that requires full metal jacketed bullets (no hollow points, exposed lead noses, or "Dum Dum" bullets) the 45 Auto was a more effective man-stopper than the 9 x 19 mm Luger round. This was remarked upon by the Germans in WW1. The 45 simply makes a larger hole than 9mm. This changed in civilian use when bullets with new technology made bullets with reliable expansion available. Even now, the later 40 caliber rounds fade because superior bullets make 9 mm a practical cartridge for self defense. Bullets have enough energy to expand to deadly diameters, and pistols with capacities up to 18 or 20 rounds are possible, compared to smaller capacities for 40 and even smaller capacities for 45 caliber pistols.
Anyway, the Thompson LaGuard tests scientifically determined the superiority of the 45 Auto in military use by extensive trials of performance against animal tissues, and these results were verified by the 1911's performance in many conflicts during decades of service.
Note here that I'm addressing civilian self defense issues, where hollow point expanding bullets are not prevented by international treaties on war. But regarding military use, it's also true that handguns do not account for a very high percentage of casualties, compared to rifles, machine guns, artillery, and other weapons. the military has other requirements than for the optimal killing sidearm.
Still, having said all of this about the effectiveness of self defense pistols, within a year I may break down and acquire a 9 mm self defense pistol. The problem here for me has always been that, when money was available, I bought guns that interested me, rather than a practical self defense too. Maybe it's time for me to join the modern world on this matter. I realize that, unfortunately, this option isn't available to the great majority of us here at IFG, so it's no solution to most people's self defense requirements.
Now, a word about accuracy: the 1911 has dominated many types of handgun competition for years, and the 45 Auto cartridge is part of that enviable performance. The notion that it gives something up in the accuracy department to the 32 Auto is a proposition that is hardly credible.
One big issue here is headspacing: Headspacing is the dimension that measures how deeply a loaded cartridge fits in the chamber of a gun. It is a very critical dimension! It the cartridge seats too deeply in the chamber, the firing pin may not strike the primer reliably, or at all, resulting in a failure to fire. If the cartridge does fire, it is possible that the brass may expand more that it is designed to, and crack or split. This will release the high pressure gas from the firearm, which is undesirable.
Well, you may ask, am I just saying this, or do I know? I've had several cartridges open up on me (military surplus ammo in a 30-06) and I will guarantee you, it is not something one would choose do experience for fun more than once. Had I not been wearing shooting glasses, I'm sure I would be wearing an eyepatch now. Little burning grains of powder embedded in my face, and this wasn't at all pleasant, either. Short story: You don't want too much headspace!
But what about too little headspace? Ammunition that is too long won't let the cartridge chamber, and the action cannot close.
Headspace for each cartridge is defined by standards organizations. This dimension allows the gun to operate correctly and not exceed the properties of the cartridge case when fired.
All this leads up to the consideration of types of cartridges. 45 Auto is straight walled rimless cartridge. The rim that is used to extract the fired case is the same diameter as the rest of the length of the case, which is quite short, especially when compared to rifle cartridges.
(Here, note that cartridges that are descended from black powder days, like 32 S&W Long and 38 Special, are much longer than most Automatic pistols, like 45 Auto, 9 x 19 mm, and 32 Auto) which were designed for smokeless powder and are much more compact.)
The 45 Auto headspaces on the case mouth. Looking at a loaded cartridge, there is a distinct ridge formed by the case mouth that can be felt by running the fingernail over the bullet and onto the case body. This ridge is what the cartridge seats on when it is loaded into the chamber. The chamber has a corresponding ridge that keeps the cartridge from going further into the chamber and barrel.
Back in the "old days" of cartridge guns, the rims of cartridges were a wide flange that seated against the barrel or chamber, like one sees in the 32 S&W Long meant for revolvers. There is nothing wrong with using this flanged type of rim to control the headspace, but in certain kinds of repeating guns, the flanged rim created problems in feeding. Yes, the British made the 303 work in bolt action repeaters and machine guns (but not without some issues0 and the Russians made the 7.62 x 54r rimmed cartridge work with an elegant and simple provision in their bolt action rifles (even better than the British in their Lee Enfields!) and machine guns. So rimmed cartridges can be made to work in repeating weapons, but the rimless case is a better way.
Europeans used rimless cartrides in their semi-automatic designs (for instance, the famous C96 "Broomhandle"), but John M Browning's first designs were "semi-rimless," having a rim flange of very small dimensions. Browning's semi-rimless cartridges allowed reliable feeding, yet allowed headspacing on the rim. This is evident in his first semi-automatic cartridge, the 32 Auto of 1899, and also the 38 Auto of 1900 and the 25 Auto of 1905. However, when the US Army specified a 45 caliber cartridge for trials of semi-automatic weapons, Browning when to a fully rimless design, even to the point of the head of his new cartridge having the same diameter of the newly adopted US Army rifle cartridge: 12 mm. Less than coincidentally, this was the same diameter of the 7 x 57 mm Spanish Mauser cartridge that proved so much more effective than the rimmed 30-40 cartridge in the awkward Krag Jorgenson rifles fielded by the Army in the Spanish-American War of 1898.
Browning also used a rimless cartridge for his later Pocket Pistol, the 380 Auto, in 1908.
Later, in 1929, the 38 Auto cartridge was loaded to much higher pressures and power. This cartridge was called the "38 Super Auto" and, while it can be chambered in older pistols, this is never done because the older pistols cannot safely withstand the additional pressure of the 38 Super Auto. The cartridge was introduced in a modified 1911 pistol, whe action of which could withstand the additional pressure of the new cartridge loading.
Like the 38 Auto, the 38 Super Auto chambered on the semi-rim, and this caused problems. The cartridge became popular again for pistol competition in the 70s, and competitors were not happy with the lessened accuracy of the 38 Super Auto, compared to the original 45 Auto.
The problem here was that the 1911 has a ridge over the rear of the barrel, and this provided the breech face that the 38 Super Auto semi-rim headspaced against. Here, the small rim, combined with the tolerance of the cartridge case in the chamber, sometimes let the cartridge rim slip under the headspace surface on the breech of the barrel. Headspacing on the case mouth, the original 45 Auto cartridge didn't have this problem, but the 38 Super Auto cartridge would sometimes chamber slightly cockeyed in the chamber, due to the rim slipping under the barrel ridge.
This problem was solved by making up barrels that didn't headspace on the semi-rim of the 38 Super Auto. Instead, the case headspaced on the case mouth, like the 45 Auto, 9 x 19mm, and other semi-auto cartridges.
32 Auto has been chambered in who knows how many types of pistols over the last 120 years, with various tolerances and designs. Originally meant to headspace on the cartridge semi-rim, I cannot say whether or what pistols might have been set up to use the case mouth for headspace, rather than the semi-rim. I just don't know. But my opinion would be that headspacing on the case mouth is supported for a full 360^, where headspacing on the semi-rim cannot have 360* support, because at least part of the barrel breech must be cut away for a feed ramp. Consequently, headspacing on the mouth of the cartridge will be more likely to position the bullet squarely to the bore, which is a key requirement for accuracy.
However, the 32 Auto is very small, and even minute powder fluctuations in loading the ammo will cause differing pressures, resulting in fluctuations in velocity, resulting in the bullet hitting the target at a different point of impact. Usually, in a light target load, a 45 Auto would use about twice as much fast burning powder than a full-power 32 Auto charge. Variations in loading charges are thus a higher percentage of 32 Auto charges than they are of 45 Auto charges.
Then, there's a wider range of powders suitable for larger 45 Auto case than for the tiny 32 Auto, giving loaders a wider range of powders to choose when testing for the load that provides the optimal accuracy.
I want to address the thread beginning from this point:
viewtopic.php?f=12&t=29081&p=275645#p275638
First of all, I would point out that the use of pistols is somewhat like dentures: one wouldn't offer his dentures to someone else having trouble eating, as one's dentures fit only one's self.
This is not an exact analogy, since dentures are made specifically for one person and guns are not (unless we're talking about target grips made for one person, which would be like dentures), but it is intended to highlight the point that, for many reasons, what handgun works for one person may well not work for another.
For instance, the case has been raised that, for a second follow-up shot, the recoil of the first shot from a 45 Auto pistol would make acquiring the sights for a second shot more difficult than for a similar case with a 32 Auto pistol. I don't think that everyone's experience in this matter would be the same, since we need to consider the size and shape of each person's hands, the size, weight, and configuration of the gun, the gun's action (e.g., blowback or short recoil), and the power of the cartridge in question.
(Here, I'd mention that the comment regarding the greater importance of disabling an attacker with the first shot as opposed to one of being able to successfully place a second shot, because the first one didn't accomplish its task.)
For me, I would have to shoot my CZ70 (32 Auto) back to back with my 1911 (45 ACP) to examine this more closely. However, I almost always shoot the CZ70 with two hands in the isosceles stance (noting that others may use different stances). I almost always have shot my 1911 in the "Bullseye," or one handed stance. (A note about the CZ70: it is very similar in size and weight with a Walther PP.) I'm basing my comparison here on some combat type shooting I did with my 1911 many years ago.
The CZ70 is a "jumpy" little thing in my hands and I don't get nearly as good of a hold on it as I do the 1911, which I consider the best and most comfortable handgun I've shot. Where the short, relatively light CZ70 jumps around in my hands, the 1911 lays in my hand, and due to its weight, length, and the hold I have on it, rolls when fired, compared to the CZ70 jumping.
Several issues are at play here that may not be the same as the experience of others. 32 Auto pistols are almost always blowback actions, and those who have shot shot recoil action 32 Auto pistols, such as the Llama or the Keltec P32, always note those pistols having less recoil than others with a blowback action. So, one factor is what kind of pistol is being shot.
Next, the 1911's long barrel and heavy frame add weight to the end of the gun keep the 1911 pretty stable, where the CZ70's stubby frame and barrel and relative lightness contribute to it being harder to control for me.
Another matter is the way the gun fits the hand. I have a large hand, with moderately long fingers and wide, long palms. There's a lot of "meat" around the grip, in other words. Most folks seem to prefer the "short" 1911 trigger and have difficulty reaching the slide release. I like the long trigger (and so I fitted one to my 1911) and have no problem with the slide release.
The CZ, on the other hand, seems to make me think of wrapping a long string around a small stick. I once had a 25 Auto that really was a problem: I could only get one full finger around the grip under the trigger guard, and the gun jumped around when fired, making it hard to control. The CZ70 is much better in this regard, somewhat like comparing driving a Tata Nano to a Honda Civic, whereas the 1911 is like driving a Bentley.
For me, that is. Now, for anyone else, with different hands and different guns, things might be different or not. The only way to find out is to shoot whatever gun is in question. Those who think that they can find out what works best for them by reading internet prattle, magazine articles, or listening to fantastic stories from members of the Old Stove Society (even if they might be true!) are only kidding themselves.
My point here is that what works for some may not work so well for others.
Another point i'd like to make here is that it sometimes seems to me that folks think of shooting a 1911 in the way they would think of shooting a light rifle in 458 Winchester. I don't think that this is so. I've shot my brother's S&W Model 29 in 44 Magnum, and my own Ruger Blackhawk in 45 Colt, using my very hot handloads. This is a step beyond the 44 magnum. I find the 1911 a pussycat compared to these other two. If one has sent a lot of lead flying down the range, what to expect when the trigger is pulled is different from those with more limited experience. There's no problem with that: the idea of things is to find the gun that fits one's pocketbook and one's ability to shoot it well, not to tell macho stories about how much one has done. But those who suggest that the 1911 might be the next thing to an elephant gun might be making a mistake slightly less wrong than the blowhards who've been everywhere, done it all, and seen everything. Judging these matters is best done with good data, and what works for one is pretty good data.
Regarding effectiveness as a defense round, the 45 Auto beats the 32 Auto fifty ways to Sunday -- nobody can, or should, seriously question this. Where the 32 Auto can barely reach the 305 mm penetration requirement of the FBI when shooting into ballistic gel, the 45 Auto can do this and much more, depending on the bullet used. The 32 Auto ammo should be chosen, if possible, for meeting at least the 305 mm limit. Here, there's a problem: I've never come across anyone running reliable ballistic gel penetration tests of IOF ammo in India.
About all one can do is think about what the performance of IOF ammo might be, compared to other ammo, and take what one can get. If one questions whether IOF 32 Auto ammo can make the 305 mm level of performance (and I'd certainly question that it can), then some thinking should be done about how one uses the gun -- at what range is it effective, and at what targets can it be effectively used against -- when one contemplates carrying.
I will mention that, lest one think that I'm adopting a superior attitude because I have a 1911 (and other handguns, as well), may I point out that I carry my CZ70 in 32 Auto 95% of the time? I recognize that there are limitations to the gun and cartridge, and try to take that into account. I've also recently acquired a large batch of 32 Auto brass, and will begin to cast my own bullets and load my own ammo, and really get down to putting lead downrange with plenty of my own ammo, rather than small quantities of expensive store-bought ammo. I'm trying to work with the best thing I can obtain to make the gun and cartridge work for me. Many here won't have that opportunity, I realize, and I'm very sorry about that. But each of us can do something to improve one's chances of surviving and unfortunate incident.
There's no question that, in military use that requires full metal jacketed bullets (no hollow points, exposed lead noses, or "Dum Dum" bullets) the 45 Auto was a more effective man-stopper than the 9 x 19 mm Luger round. This was remarked upon by the Germans in WW1. The 45 simply makes a larger hole than 9mm. This changed in civilian use when bullets with new technology made bullets with reliable expansion available. Even now, the later 40 caliber rounds fade because superior bullets make 9 mm a practical cartridge for self defense. Bullets have enough energy to expand to deadly diameters, and pistols with capacities up to 18 or 20 rounds are possible, compared to smaller capacities for 40 and even smaller capacities for 45 caliber pistols.
Anyway, the Thompson LaGuard tests scientifically determined the superiority of the 45 Auto in military use by extensive trials of performance against animal tissues, and these results were verified by the 1911's performance in many conflicts during decades of service.
Note here that I'm addressing civilian self defense issues, where hollow point expanding bullets are not prevented by international treaties on war. But regarding military use, it's also true that handguns do not account for a very high percentage of casualties, compared to rifles, machine guns, artillery, and other weapons. the military has other requirements than for the optimal killing sidearm.
Still, having said all of this about the effectiveness of self defense pistols, within a year I may break down and acquire a 9 mm self defense pistol. The problem here for me has always been that, when money was available, I bought guns that interested me, rather than a practical self defense too. Maybe it's time for me to join the modern world on this matter. I realize that, unfortunately, this option isn't available to the great majority of us here at IFG, so it's no solution to most people's self defense requirements.
Now, a word about accuracy: the 1911 has dominated many types of handgun competition for years, and the 45 Auto cartridge is part of that enviable performance. The notion that it gives something up in the accuracy department to the 32 Auto is a proposition that is hardly credible.
One big issue here is headspacing: Headspacing is the dimension that measures how deeply a loaded cartridge fits in the chamber of a gun. It is a very critical dimension! It the cartridge seats too deeply in the chamber, the firing pin may not strike the primer reliably, or at all, resulting in a failure to fire. If the cartridge does fire, it is possible that the brass may expand more that it is designed to, and crack or split. This will release the high pressure gas from the firearm, which is undesirable.
Well, you may ask, am I just saying this, or do I know? I've had several cartridges open up on me (military surplus ammo in a 30-06) and I will guarantee you, it is not something one would choose do experience for fun more than once. Had I not been wearing shooting glasses, I'm sure I would be wearing an eyepatch now. Little burning grains of powder embedded in my face, and this wasn't at all pleasant, either. Short story: You don't want too much headspace!
But what about too little headspace? Ammunition that is too long won't let the cartridge chamber, and the action cannot close.
Headspace for each cartridge is defined by standards organizations. This dimension allows the gun to operate correctly and not exceed the properties of the cartridge case when fired.
All this leads up to the consideration of types of cartridges. 45 Auto is straight walled rimless cartridge. The rim that is used to extract the fired case is the same diameter as the rest of the length of the case, which is quite short, especially when compared to rifle cartridges.
(Here, note that cartridges that are descended from black powder days, like 32 S&W Long and 38 Special, are much longer than most Automatic pistols, like 45 Auto, 9 x 19 mm, and 32 Auto) which were designed for smokeless powder and are much more compact.)
The 45 Auto headspaces on the case mouth. Looking at a loaded cartridge, there is a distinct ridge formed by the case mouth that can be felt by running the fingernail over the bullet and onto the case body. This ridge is what the cartridge seats on when it is loaded into the chamber. The chamber has a corresponding ridge that keeps the cartridge from going further into the chamber and barrel.
Back in the "old days" of cartridge guns, the rims of cartridges were a wide flange that seated against the barrel or chamber, like one sees in the 32 S&W Long meant for revolvers. There is nothing wrong with using this flanged type of rim to control the headspace, but in certain kinds of repeating guns, the flanged rim created problems in feeding. Yes, the British made the 303 work in bolt action repeaters and machine guns (but not without some issues0 and the Russians made the 7.62 x 54r rimmed cartridge work with an elegant and simple provision in their bolt action rifles (even better than the British in their Lee Enfields!) and machine guns. So rimmed cartridges can be made to work in repeating weapons, but the rimless case is a better way.
Europeans used rimless cartrides in their semi-automatic designs (for instance, the famous C96 "Broomhandle"), but John M Browning's first designs were "semi-rimless," having a rim flange of very small dimensions. Browning's semi-rimless cartridges allowed reliable feeding, yet allowed headspacing on the rim. This is evident in his first semi-automatic cartridge, the 32 Auto of 1899, and also the 38 Auto of 1900 and the 25 Auto of 1905. However, when the US Army specified a 45 caliber cartridge for trials of semi-automatic weapons, Browning when to a fully rimless design, even to the point of the head of his new cartridge having the same diameter of the newly adopted US Army rifle cartridge: 12 mm. Less than coincidentally, this was the same diameter of the 7 x 57 mm Spanish Mauser cartridge that proved so much more effective than the rimmed 30-40 cartridge in the awkward Krag Jorgenson rifles fielded by the Army in the Spanish-American War of 1898.
Browning also used a rimless cartridge for his later Pocket Pistol, the 380 Auto, in 1908.
Later, in 1929, the 38 Auto cartridge was loaded to much higher pressures and power. This cartridge was called the "38 Super Auto" and, while it can be chambered in older pistols, this is never done because the older pistols cannot safely withstand the additional pressure of the 38 Super Auto. The cartridge was introduced in a modified 1911 pistol, whe action of which could withstand the additional pressure of the new cartridge loading.
Like the 38 Auto, the 38 Super Auto chambered on the semi-rim, and this caused problems. The cartridge became popular again for pistol competition in the 70s, and competitors were not happy with the lessened accuracy of the 38 Super Auto, compared to the original 45 Auto.
The problem here was that the 1911 has a ridge over the rear of the barrel, and this provided the breech face that the 38 Super Auto semi-rim headspaced against. Here, the small rim, combined with the tolerance of the cartridge case in the chamber, sometimes let the cartridge rim slip under the headspace surface on the breech of the barrel. Headspacing on the case mouth, the original 45 Auto cartridge didn't have this problem, but the 38 Super Auto cartridge would sometimes chamber slightly cockeyed in the chamber, due to the rim slipping under the barrel ridge.
This problem was solved by making up barrels that didn't headspace on the semi-rim of the 38 Super Auto. Instead, the case headspaced on the case mouth, like the 45 Auto, 9 x 19mm, and other semi-auto cartridges.
32 Auto has been chambered in who knows how many types of pistols over the last 120 years, with various tolerances and designs. Originally meant to headspace on the cartridge semi-rim, I cannot say whether or what pistols might have been set up to use the case mouth for headspace, rather than the semi-rim. I just don't know. But my opinion would be that headspacing on the case mouth is supported for a full 360^, where headspacing on the semi-rim cannot have 360* support, because at least part of the barrel breech must be cut away for a feed ramp. Consequently, headspacing on the mouth of the cartridge will be more likely to position the bullet squarely to the bore, which is a key requirement for accuracy.
However, the 32 Auto is very small, and even minute powder fluctuations in loading the ammo will cause differing pressures, resulting in fluctuations in velocity, resulting in the bullet hitting the target at a different point of impact. Usually, in a light target load, a 45 Auto would use about twice as much fast burning powder than a full-power 32 Auto charge. Variations in loading charges are thus a higher percentage of 32 Auto charges than they are of 45 Auto charges.
Then, there's a wider range of powders suitable for larger 45 Auto case than for the tiny 32 Auto, giving loaders a wider range of powders to choose when testing for the load that provides the optimal accuracy.