GTA
Airguns by Make and Model => Crosman Airguns => Topic started by: under500 on January 23, 2017, 05:33:04 PM
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I was looking at buying a Crosman 1322 and was wondering what would happen if I used some of those heavier pellets like those JSBs. I know they would go slower, but how much slower? For instance, the heaviest pellet they make comes in at 34 gr. I don't even know if it could move such a pellet!
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I have been shooting JSB 18.1's with my 1322c (FTP and 14.6") at 457 fps with 12 pumps. And 500 fps with 20 pumps. (Not getting all the air out after 15 pumps - still working on the spring setup). I have seen comments that the really heavy pellets are for powerful PCP rifles. I would work up pellet weights a bit slowly.
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Problem is, in Canada, it's max 500 f.p.s. (hence my user) so I probably can't make those adjustments. The most I can do is the stock, steel breech and scope.
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I would probably stick with the 14 grain vicinity, you might do good with 16 grain too, much more than that would probably be too much for a stock 1322. I'll bet the Crosman 14.3's would be in the mid to upper 400 fps but I've never had one or ran one over a chrony myself. You guys got some tough airgun laws in Canada I know, I chat quite often with Robert from NS in the chatroom. Here in Michigan for many years any pistol in .177 with a rifled barrel or larger had to be registered, it wasn't until recently that our laws got much better back in 2015.
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One decent thing most large companies do is make detuned versions of some of their guns so we can get them. For instance, Crosman has both the Optimus and 1377 at 495 f.p.s., among other guns.
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Stock 10" 1322 should not shoot 500 fps - mostly 435 - 460 fps with 14.3's.
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I know, I said 1377.
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Problem is, in Canada, it's max 500 f.p.s. (hence my user) so I probably can't make those adjustments. The most I can do is the stock, steel breech and scope.
Box stock 1322 is still fun. Good for pigeons, collared doves, etc.
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Of course! The stock 22 is plenty powerful, especially for Canada, I was just wondering if heavier pellets would work. Perhaps I'll try some when I get my 1322, and post a report with a chrony.
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if your limitation is fps, not fpe, why not use 16-18gr and up the power output to get those close to 500fps ?
peace
kj
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With what mods? Is there a mod that can raise the fps to a level just under 500 without going over?
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With what mods? Is there a mod that can raise the fps to a level just under 500 without going over?
I imagine the mod would be all the normal power mods, except you just wouldn't pump it as much. Even a valve that only allowed so much PSI would allow you to go over 500 fps with light pellets.
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Dominic,
Here is a bit of data for initial your question.
I found some JSB Exact Jumbo Monster pellets which weight 25.4 grains.
To set up the comparison, I adjusted the power of a 1322 to reflect what a good 1322 with 10 inch barrel would shoot at sea level (I am at an elevation of 5835 feet) with CPP 14.3 grain pellets, and that data point is 454 fps.
Using the same power level the JSB 25.4 grain pellets shot at 357 fps.
HTH
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Thanks for the test. At 357 f.p.s., a 25.4 gr. pellet will have about 7 ftlb, which is about the same as 14.3 gr. at 454 f.p.s, so really no difference.
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if your limitation is fps, not fpe, why not use 16-18gr and up the power output to get those close to 500fps ?
peace
kj
The Canadian law is that you must not exceed 500 fps AND 4.2 fpe in an airgun if you don't have a firearm license. And with pistols and revolvers (hand guns), you must have a Restricted Possession and Acquisition License if you want to go over that limit. You could indeed boost the power to use heavier pellets at sub-500 fps velocity, but the thing is that the RCMP make their test with commercially available, lowest weigth pellets. So if your gun shoots a 18 grains pellet at say 485 fps, you get 9.4 fpe. Nice, but if your gun is tested with RWS Hobby 11.9 grains, and they fly at 560 fps for example, you get 8.3 fpe, so you're toast.
FWIW, my best advice is to find the lightest commercially available pellet and tune your pistol for max. velocity with it, without going over the 4.2 fpe limit. Sad, but safer. Or don't mod your gun at all power-wise.
Here's a rather useful page to calculate fpe: https://www.pyramydair.com/article/What_is_Muzzle_Energy_August_2003/5 (https://www.pyramydair.com/article/What_is_Muzzle_Energy_August_2003/5)
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So pardon my Yankee ignorance... But to they come knocking on your door and say..
"We see you have bought a pellet gun. We need to test it" and hold out their hands for you to submit to their request?
NOT suggesting you bend the rules! Just curious as to how it is enforced.
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So pardon my Yankee ignorance... But to they come knocking on your door and say..
"We see you have bought a pellet gun. We need to test it" and hold out their hands for you to submit to their request?
NOT suggesting you bend the rules! Just curious as to how it is enforced.
I don't know the exact procedure, but I guess ''they'' will knock at your door if ever a complaint is made to ''them''. If someone is dumb enough to go to the range with an over-the limits air pistol that sounds like a powder-burner .22LR, and he or she doesn't have a valid RPAL, I guess it's possible that the range's authority make a complaint. There could be other scenarios too. I'm no lawyer, policeman or specialist of that subject, but I know the law. Always good to be well informed ;)
And you're gladly pardonned ;D :D
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if your limitation is fps, not fpe, why not use 16-18gr and up the power output to get those close to 500fps ?
peace
kj
The Canadian law is that you must not exceed 500 fps AND 4.2 fpe in an airgun if you don't have a firearm license. And with pistols and revolvers (hand guns), you must have a Restricted Possession and Acquisition License if you want to go over that limit. You could indeed boost the power to use heavier pellets at sub-500 fps velocity, but the thing is that the RCMP make their test with commercially available, lowest weigth pellets. So if your gun shoots a 18 grains pellet at say 485 fps, you get 9.4 fpe. Nice, but if your gun is tested with RWS Hobby 11.9 grains, and they fly at 560 fps for example, you get 8.3 fpe, so you're toast.
FWIW, my best advice is to find the lightest commercially available pellet and tune your pistol for max. velocity with it, without going over the 4.2 fpe limit. Sad, but safer. Or don't mod your gun at all power-wise.
Here's a rather useful page to calculate fpe: https://www.pyramydair.com/article/What_is_Muzzle_Energy_August_2003/5 (https://www.pyramydair.com/article/What_is_Muzzle_Energy_August_2003/5)
Yeah but both numbers need to go over. You can have a 9FPE gun but only shooting 490 FPS.
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Here's another calculator:
http://www.thefirearmblog.com/blog/2014/09/15/muzzle-energy-calculator/ (http://www.thefirearmblog.com/blog/2014/09/15/muzzle-energy-calculator/)
This one allows calculations in any direction, i.e., enter energy and velocity and get pellet weight.
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Yes, this is true. Both numbers need to be over the limit in order for it to be a "firearm". That's why I was looking for heavier pellets, see if I could increase the ftlb energy without increasing the fps. But I suppose I could just make the non-power increasing mods and take the gun for what it is, I was just seeing if it was possible.
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if your limitation is fps, not fpe, why not use 16-18gr and up the power output to get those close to 500fps ?
peace
kj
The Canadian law is that you must not exceed 500 fps AND 4.2 fpe in an airgun if you don't have a firearm license. And with pistols and revolvers (hand guns), you must have a Restricted Possession and Acquisition License if you want to go over that limit. You could indeed boost the power to use heavier pellets at sub-500 fps velocity, but the thing is that the RCMP make their test with commercially available, lowest weigth pellets. So if your gun shoots a 18 grains pellet at say 485 fps, you get 9.4 fpe. Nice, but if your gun is tested with RWS Hobby 11.9 grains, and they fly at 560 fps for example, you get 8.3 fpe, so you're toast.
FWIW, my best advice is to find the lightest commercially available pellet and tune your pistol for max. velocity with it, without going over the 4.2 fpe limit. Sad, but safer. Or don't mod your gun at all power-wise.
Here's a rather useful page to calculate fpe: https://www.pyramydair.com/article/What_is_Muzzle_Energy_August_2003/5 (https://www.pyramydair.com/article/What_is_Muzzle_Energy_August_2003/5)
i see now. from his original post it looked like he was trying to find a way to get more power without going over the 500fps. having an energy part of the law is pretty rough.
kj