increased barrel length in co2 gun

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shredder0

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I am wondering if there is a similar relationship between barrel length and muzzle velocity with co2 guns as with "gunpowder" guns. Reason being I have a Crosman 2240 pistol and the option to get replacement barrels in 10, 14, and 24 inch lengths. With the addition of a shoulder stock this could be a really neat carbine.

Is the 24 inch barrel a waste of time - law of diminishing returns or will I get max velocity from say the 10 inch barrel. Does anyone have any chronograph data to back up thier opinions?
 
A longer barrel gives the co2 more time to expand and provide its energy. To a point. After the gas stops expanding, extra barrel length will slow the pellet.
 
a longer barrel will only increase velocity if you got the co2 volume to push all the way down the pipe....

to achieve that you will need to change the valving of your gun in order to get more flow from the tank.

that can be a bit tricky and I don't know if those little co2 cartrige got enaugh pressure to significantly raise the velocity

my 2 cents....
 
I know this is an old post but thought I would add that the 2240 in stock for wastes alot of gas. You will see improvement in velocity right up to the 24" barrel. however if you bring it over 500fps you will have a restricted firearm regardless of what length it is.

http://www.airgunforum.ca/forums/post283803.html?hilit=2240%20barrel%20length#p283803
 
Is that with the lightest pellet on the market or the heaviest? A 22 cal pellet can weigh up to 25 grains or so.
I find it is such horseshi*. There is no way an airgun should have the same laws as a powder burner because of some velocity mark. How did we allow this to happen? Sorry for the rant.
 
I agree with your rant. I settled on the 14" barrel and a shoulder stock and I quite like the little carbine I made. I believe it is very similar to the 2250. I have a chronograph but have not measured velocity in this gun yet. It is still a 10 meter target gun to me. But what a target gun it is! Very accurate.
 
windage said:
Is that with the lightest pellet on the market or the heaviest? A 22 cal pellet can weigh up to 25 grains or so.
I find it is such horseshi*. There is no way an airgun should have the same laws as a powder burner because of some velocity mark. How did we allow this to happen? Sorry for the rant.
Click to expand...

I believe that those numbers were done with standard weight crosman .22 pellets, I could be wrong though. If you meant which pellet the cfo would test with, that is why they have the energy limit as well. With all the ultra light pellets on the market, most of the airguns that canadian tire sold became firearms and would need to be registered. But with the energy limit the lighter pellets wouldnt produce enough energy to be over the limit
 
I agree with your logic to some degree and I could possibly see why they included the energy factor in the equation but it was not intended for air rifles. It was intended for people who are involved in airsoft.

The lightest 22 cal pellet that I know of is the Crossman SSP lead free at 9.5 grains. The energy limit is 5.7 joules or 4.2 ft/lbs. That 22 cal pellet traveling at 500 fps will break that limit easily with 5.3 ft/lbs. With that light pellet most standard 495 fps 22. cal rifles/pistols will push that pellet beyond 500 fps.

Those numbers tell me that every 495 ft/sec 22 cal pellet pistol/rifle in this country needs to be registered as a firearm or a restricted handgun and I am sure a good majority of those people don't have FAC's.
 
windage said:
Is that with the lightest pellet on the market or the heaviest? A 22 cal pellet can weigh up to 25 grains or so.
I find it is such horseshi*. There is no way an airgun should have the same laws as a powder burner because of some velocity mark. How did we allow this to happen? Sorry for the rant.
Click to expand...

You surely wouldn't want hordes of criminal types running around with high velocity air guns or muzzle-loaders, would you? Just stop and think about it! Canada would become like a war zone! When C68 came along, I was involved in trying to get air guns and muzzle-loaders exempted, but .......

BTW, at the time , IIRC, the OFAH sold us up the creek for anything that looked milltary.
 
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