powerful airguns

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dev
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Post by dev » Mon Feb 12, 2007 12:52 pm

Apologies but Mehul could that be a Marlin 39A? But the Marlin is a lever action so I am sure I am way off the mark but just curious.


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Dev
mehulkamdar";p="12060 wrote: Sujay,

Every time I look at buying an air rifle here, I am shocked at how much it costs to own and shoot one. Shooting a 22 lr rifle is cheaper and owning one vastly more so. Since I posted about buying the Gamo, Mark and I bought ourselves some new guns - Mark a 20 gauge shotgun and I bought a Winchester 39A target model 22 lr rifle which I am now restoring. I got a superb gun at a very reasonable price from someone who had inherited it and didn't want it.

Cost is the problem here, and, if you ask Mack The Knife, my Gujarati blood has more than a little to do with it. :mrgreen: An old and politically completely incorrect Russian joke says that in business and in stinginess, a Greek is the equivalent of three Jews and an Armenian the equivalent of three Greeks. The Russians probably did not know of my clan, or they would have considered Gujaratis to be the worst of the lot. :lol: No offense to anyone belonging to any community, but it is clear that there must be some truth to this considering how many times I have come to the brink of ordering an air rifle and then decided to go with shooting a 22 more. :mrgreen:

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Re: powerful airguns

Post by Grumpy » Mon Feb 12, 2007 1:34 pm

??? Mehul said the Marlin 60 which is a semi-auto .22 lr.
The Marlin 39A is a lever action as you suggest.......You won`t find lever actions being recommended often, especially in .22lr. The most accurate lever action rim-fire is often reckoned to be the Henry. I`ve tried both a Henry lever action .22lr and their .17HMR `Varmint Express` and wasn`t impressed with either - but then you can`t expect the 1/2 MOA 100 yd groups that the CZ 452 Varmint .17HMR will chuck out from a lever action.

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Re: powerful airguns

Post by Mack The Knife » Mon Feb 12, 2007 1:37 pm

Hi Mark,

That's a good suggestion to see at what range the pellet goes transonic and how it groups.

Airgunners have had a computer programme called Chairgun for a few years now. Started by a chap on the Airgun BBS but for some reason I have never played with it. Probably because I prefer empirical results to theoretical one's, I suppose.

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Re: powerful airguns

Post by Mack The Knife » Mon Feb 12, 2007 1:41 pm

Will order them rightaway.
Just one tin, Mehul.

Navdeep's leaving on the 17th. However, I am in no hurry because I definitely wont be trying them in my airguns as their diet has already been fixed.

Thanks.

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Re: powerful airguns

Post by Mack The Knife » Mon Feb 12, 2007 1:46 pm

Mack The Knife, what do you have to say about the effect on spring (which is supposed to deliver 1250 fps ) if using a pellet of only 5 grains ?
I'd say it will cause far too much piston slam. Don't exactly know what it would do to the main-spring but it's certainly going to make for a rather harsh firing cycle. To say nothing about broken scopes, loosened stock screws, etc.

Avoid these very light pellets.

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Re: powerful airguns

Post by Mack The Knife » Mon Feb 12, 2007 1:52 pm

striker";p="12036 wrote:Do the locktime differs in every air gun?
Do you mean across the board? If so, yes, most definitely.

If you mean within a particular model for the same muzzle energy, then again the answer would be yes but the difference would be so small it would hardly be recognisable.

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Re: powerful airguns

Post by Mack The Knife » Mon Feb 12, 2007 1:54 pm

Shahid,

Thanks for the Bushranger details. However, I have my doubts if it could fill a SCUBA cylinder to 200 + BAR.

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Re: powerful airguns

Post by Mack The Knife » Mon Feb 12, 2007 2:12 pm

The top end PCPs are justifiably expensive IMO considering what goes to put together a mechanism capable of near rimfire velocity.
Sujay, they may have a few more components but it certainly does not justify raising the price three to five fold. I do not have component prices at hand but my gut feeling says that airgunners ARE being ripped off across the board and that includes pellet prices as well.
and not a particularly high pressure tank at that - 300 PSi is of little consequence.
Grumpy, that should be an operating pressure of 3000 PSI. In actual fact, the cylinder is manufactured to withstand a lot more.

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Re: powerful airguns

Post by Mack The Knife » Mon Feb 12, 2007 2:20 pm

Yes, the licence fee goes to the BATF and costs $200.00 per moderator.

Some airguns in the U.S., imported or otherwise but mostly the former, are being sold with moderators but do not require paying of this fee as the moderators are permanently fixed to the barrel.

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shahid

Post by shahid » Mon Feb 12, 2007 4:31 pm

I am also not in favor of these very light 5.1 grain pellets. Maybe they have a higher Muzzle velocity, but what is really important is downrange knockdown power, i.e. K.E. and hydrostatic shock at 30 yards.

The 8 grain pellets developed for .177 and the 14/15 grain ones for .22 seem to be better suited for the job.

I am now going to get hold of a Diana H 350 Mag in .22 whenever new stocks arrive with the Dubai dealer.

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Re: powerful airguns

Post by Mack The Knife » Mon Feb 12, 2007 10:37 pm

but what is really important is downrange knockdown power, i.e. K.E. and hydrostatic shock at 30 yards.
Not sure about the hydrostatic shock. I thought that theory was debunked some years ago but could be wrong.

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Re: powerful airguns

Post by Mark » Mon Feb 12, 2007 11:05 pm

Mack The Knife Bana";p="12173 wrote:Hi Mark,

That's a good suggestion to see at what range the pellet goes transonic and how it groups.

Airgunners have had a computer programme called Chairgun for a few years now. Started by a chap on the Airgun BBS but for some reason I have never played with it. Probably because I prefer empirical results to theoretical one's, I suppose.

Mack The Knife
LOL, reminds me of the saying "In theory, there is not much difference between practice and theory. In practice, there is"

Here is a link to a site with several interesting programs, use the "External Ballistics Calculator"

http://www.beartoothbullets.com/rescources/index.htm

Also, you can't do it with your chrono but if you can use one with screens somewhere they have a program you can use to figure out your own BC in there.
Last edited by Mark on Tue Feb 13, 2007 12:21 am, edited 1 time in total.
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Re: powerful airguns

Post by mehulkamdar » Tue Feb 13, 2007 12:05 am

Grumpy/Mack The Knife,

The regulations for owning a moderated rifle are the same as for owning a full auto firearm. Every time you sell one you have to pay a $ 250 Federal transfer tax which pushes their prices to ridiculous levels. That is why no one really bothers about them.

I somehow like the Accutrigger Savage rifles having shot one in Appleton in 223 at the Twin Cities Rod and Gun Club belonging to a friend there. At the time they didn't offer the Accu Trigger on their rimfires but public demand forced them to. Since they are the cheapest rifles available in the USA they are fantastic value for money over here which might not be the case in Europe.

Dev,

Marlin make several 22 rifles - lever guns, bolt actions and semi auto. They have for more than a century now. IIRC theya re the world's largest manufacturers of rimfire rifles, and, in centrefire rifles, they are just a little behind the Russian Izhmash-Baikal combine which is the largest. My rifle is a Model 60 semi auto - the pics are in the thread where Amit tests his 22 Trailside pistol.

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Re: powerful airguns

Post by Grumpy » Tue Feb 13, 2007 1:15 am

Mack The Knife, of course you are right - that should be 300 BAR not PSI......rather a lot of difference ! I still think that most PCPS are an absolute rip-off compared to a break barrel or underlever air rifle.

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Re: powerful airguns

Post by mehulkamdar » Tue Feb 13, 2007 2:09 am

Mack The Knife,

The PBAs are on their way to my place. WIll see if I could get them acrss to Navdeep. If I can't, I would be grateful if you would let me know if anyone else was coming to Bangalore.

Cheers!

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