Hi I picked up a used 2240 Co2 pistol with a 7" barrel I added a adjustable Hammer spring kit I'm using 14.4 pellets the hammer spring kit got me from 328 to 358 FPS if I change the barrel to a 10" or 14" how much more FPS can I expect. Thanks in advance Keith
Tuning 2240 barrel change
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Your numbers should be a bit higher like in the 425fps range with a 14.3 pellet at near 70 deg with the stock gun. You may have a leak somewhere or the transfer port is too small.
You get about 15fps more for every inch of barrel you add on to around 14 to 18 inches then less as you make the barrel longer.
You get about 15fps more for every inch of barrel you add on to around 14 to 18 inches then less as you make the barrel longer.
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Thanks for replying so that means 10” barrel should give me 45 FPS and 14 “ gives me would be 105 FPS so at around 358 a 14” barrel would put me around 460fps
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Attached are some data for my 2240 upgrades. They show comparable speeds to what you've seen and what others are saying.
In all of them I'm shooting with a fresh CO2, with the same Crosman 14.3gr pellets. Note the times - I'm not waiting a long time between shots.
FWIW, my 2240XL now shoots at the same level as a box-stock 2260MB. I then make some adjustments to the 2260 and got another 100fps out of it. In the 2260 I also removed about 1/4" of thread from the valve interior.
Andy
View attachment 2240xl_first_shots_stock.1623162779.pdf
View attachment 2400xl_14_barrel_only.1623162779.pdf
View attachment 2400xl_polished_hammer_graphite_lube_1_8_tp.1623162779.pdf
In all of them I'm shooting with a fresh CO2, with the same Crosman 14.3gr pellets. Note the times - I'm not waiting a long time between shots.
FWIW, my 2240XL now shoots at the same level as a box-stock 2260MB. I then make some adjustments to the 2260 and got another 100fps out of it. In the 2260 I also removed about 1/4" of thread from the valve interior.
Andy
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I have a 2240XL that I converted into a 2250 with a 16" barrel. I have a larger transfer port and valve from alchemy
I had a 7" and 14" barrel in mine previously. If you can deal with the extra length the 16" is where its at. I think it was a 19" or longer that was cut down and crowned from alchemy. The stock crosman barrels only really likes crosman pellets (my guess is choke.) This 16" loves JSB variants and primiers. I have a Flashpup project and I keep going back to shoot this crosman, i really love it that much.
That cheap Hawke Vantage fixed 4x scope is hands down one of my best purchases for shooting EVER. I've won events with it on a 10/22, and it shoot lights out at home on a franken2240.
I snipe flies at 20 yards with it.
I had a 7" and 14" barrel in mine previously. If you can deal with the extra length the 16" is where its at. I think it was a 19" or longer that was cut down and crowned from alchemy. The stock crosman barrels only really likes crosman pellets (my guess is choke.) This 16" loves JSB variants and primiers. I have a Flashpup project and I keep going back to shoot this crosman, i really love it that much.
That cheap Hawke Vantage fixed 4x scope is hands down one of my best purchases for shooting EVER. I've won events with it on a 10/22, and it shoot lights out at home on a franken2240.
I snipe flies at 20 yards with it.
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My problem is I start out by taking my time between shots and shooting paper..... Then i see the spinner.....maybe just one... and again....
But here is some backyard labradar. Its a suburban backyard rodent defender, so I only have the radar reading out to 15 yards. I should do 25 next time.
But here is some backyard labradar. Its a suburban backyard rodent defender, so I only have the radar reading out to 15 yards. I should do 25 next time.
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