Gunmark air-rifles/ air-pistols

[dev]

Why don't they have anything lighter in .22, jeez I need a 15 grain pellet or I can see them 18 and 19 grains arching thru my scope. And so I guess they are unsuitable for most springers due to their weight? What say Mack The Knife? is this why you normally avoid them?

Dev

[biking3819]

ok first one lil out of place 2nd onecud have been better to express madness on them in case the chrono records 750 fps or less,'love to speak with them was meant to be sarcastic'
we really need to check,very confused me as of now
groupings were nice so some satisfaction wud still prevail.
anyways,,dear Rusty do u have any plans to join us in the jamboree of the mumbai bhai's...and get the chrono along and a selected few of ur beauties..your esteemed presence wud be very eventful for sure.
regards sanjiv

[Mack The Knife]

Why don't they have anything lighter in .22, jeez I need a 15 grain pellet or I can see them 18 and 19 grains arching thru my scope. And so I guess they are unsuitable for most springers due to their weight? What say Mack The Knife? is this why you normally avoid them?

Dev

Heavy pellets are supposed to reduce the life of a main-spring. The reason I avoid these pellets is not because of their weights (I only learnt those this morning) but because of the variation in size. I have also seen one consignment in which quite a few pellets had part of their skirts missing. On the other hand, their .177" calibre wadcutters seemed to have been better made but this was a few years back (2001/2/) when they were first introduced and I had tested it for them.

[biking3819]

dev,
i had asked for lighter pellets and they said they were in the verge of producing tieups in .177 and lighter .22s as well.
no idea when they wud .
as of now i am using the high splits in .22,and h&n finalematch in .177 for 10mts.
regards sanjiv

[biking3819]

rusty thats why they told me that they have 'tieups' other than the p10,...the tieups sud be expensive i didnt ask,they said that these were very consistant batch of .177s wrt their size and wt.
regards sanjiv

[dev]

"Heavy pellets are supposed to reduce the life of a main-spring. The reason I avoid these pellets is not because of their weights (I only learnt those this morning) but because of the variation in size. I have also seen one consignment in which quite a few pellets had part of their skirts missing. On the other hand, their .177" calibre wadcutters seemed to have been better made but this was a few years back (2001/2/) when they were first introduced and I had tested it for them."

Okay, I saw the high impact ones do very well in a friends hw 77 but they really ARC in the QB after twenty or so meters. I thought that they should be good in gas or pcp rifles I guess. I hadn't believed the guy when I had written to him about pellet weights and learnt that were between 18 and 19 grain. So atleast we have a nice heavy pellet to shoot all that one needs is a pcp rifle next. Their p10 was really nice around 2000/2001 when I had the Crosman in .177. Now the batches really vary.

Regards,

Dev

[dev]

dev,
i had asked for lighter pellets and they said they were in the verge of producing tieups in .177 and lighter .22s as well.
no idea when they wud .
as of now i am using the high splits in .22,and h&n finalematch in .177 for 10mts.
regards sanjiv

Hi Sanjeev,

Thanks for doing the research, how is the trigger in your rifle? Any better than the IHP 35?

Dev.

[biking3819]

Hi Sanjeev,

Thanks for doing the research, how is the trigger in your rifle? Any better than the IHP 35?

Dev.
[/quote]

hi dev,
thanx again for the appreciation by ifg gurus .
Dev i wud say the trigger is similar heavy wt but somehow manages to give a better break, but still typical single catch.
i had managed to download a few pics of earlier HW triggers,it wud be great if we cud design one and put it in this rifle and the nationals.
regards sanjiv

[dev]

If you do a search for 'Charlie the tuna' he has created a great trigger for gamo rifles. It is a drop in kit that can be used for gamo rifles. If you get the design maybe that could be a way to go. Or else what Abhijeet often talks about the ball bearing wala trigger set up of the diana.

Thanks again.

Regards,

Dev

[Mack The Knife]

ok first one lil out of place 2nd onecud have been better to express madness on them in case the chrono records 750 fps or less,'love to speak with them was meant to be sarcastic'
we really need to check,very confused me as of now
groupings were nice so some satisfaction wud still prevail.
anyways,,dear Rusty do u have any plans to join us in the jamboree of the mumbai bhai's...and get the chrono along and a selected few of ur beauties..your esteemed presence wud be very eventful for sure.
regards sanjiv

Sanjiv,

Don't get too hung up on power because power without control (accuracy, in this case) means nothing. What are the group sizes you are presently getting and at what range/s?

I have my doubts if you will even see 700 ft./sec. on the chrono with the heavy G. Smith pellets. If I were to make an educated guess, I'd say your gun may clock 550 to 600 fps, at the very most, with those G.Smith pellets.

Bear in mind that we are assuming that G. Smith's claim of 900 to 950 fps was with their own brand of pellets. Perhaps you are unaware but there are many reputed international airgun manufacturers who use extremely light for calibre pellets to get those advertised muzzle velocities and the Diana you mention is a perfect example of this sort of misleading advertisement.

I am sorry but I cannot make it for the get together but I will be in Poona from the 26th to 29th December. I very much doubt I will have any time to myself then but we will try and work something out.

Mack The Knife

[biking3819]

ya Mack The Knife i guess so,these are marketing gimmicks,....i know how beeman and all uses the lightest pellets to calculate MV's.Still i wud like to chrono this particular rifle with the lightest pellet ever available in india,document it with video etc and clear my stand with the manufacturer.
By the way cud you explain how u calculated the ME's in ft pounds ,with the wt of the pellet and mV.
is there any online converter or u had used a traditional formulae.
It wud be a great thing to learn and sud be handy to counter ad gimmicks faster.
regards sanjiv

[andy_65_in]

Hi biking go to American Airgun website and click CALCULATORS column. yu will automatically be shown a converter table an excellent assistant for calculating pellet energy. downoad it into ur laptop u can readily calculate .andy

[Pran]

By the way cud you explain how u calculated the ME's in ft pounds ,with the wt of the pellet and mV.
is there any online converter or u had used a traditional formulae.

http://www.airhog.com/convert.htm

[Mack The Knife]

M.E. = M x V x V / 450240

M.E. = muzzle energy ( ft.lbs.)

M = weight of pellet (in grains)

V = muzzle velocity ( in ft./sec.)

The constant 450240 is actually no longer in use. Grumpy had mentioned the figure that is in use these days but I cannot recall this.

[Mack The Knife]

Still i wud like to chrono this particular rifle with the lightest pellet ever available in india,document it with video etc and clear my stand with the manufacturer.

You are assuming that they may have used the lightest Indian made pellet. What if they used a light imported .22 pellet such as the RWS Hobby?

Unless you are able to get this detail from the manufacturer, the exercise will not meet your intended goal.