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PostPosted: Fri Sep 27, 2013 8:49 pm 
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Location: Richmond, BC
Hi guys, Im planning on getting a crosman 2289 backpacker, and I plan on putting a longer barrel and steel breech just to start... I was wondering if there would be a big difference in speed and accuracy between installing an 18 inch vs a 24 inch barrel... will the 6 inch increase make a significant difference or is it overkill??? thanks for your input.. :D


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PostPosted: Fri Sep 27, 2013 9:47 pm 
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I had a 2289 with a 24" barrel, steel breech and flat top piston kit and it didnt go over 500fps but i could just pump it only 6-7 times and that was enough to have fun and it was really accurate without recrowing the barrel so i will say go for the 24" if ur not happy u can cut it but u can't make the 18" longer right

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crosman 2240 (modded to target pistol)
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PostPosted: Sat Sep 28, 2013 8:12 am 
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I lost 10 fps per inch when I replaced my OEM Discovery barrel with a 20 inch LW barrel I had spare. (.177 cal)


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PostPosted: Sat Sep 28, 2013 10:05 am 
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Barrel length does not necessarily mean better accuracy. The edgun is I believe a 12" barrel and we all know what that gun can do. I have a 14" and 18" for my 2240 and 2289 and both are equally accurate.

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PostPosted: Sat Sep 28, 2013 2:38 pm 
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Location: Richmond, BC
Thanks for the reply guys!!! I allready have a 1377 with 18 inch barrel and a 1322 that has a 14 inch barrel... Both shoot amzingly well..... I wanted to build a pumper with a fat pump handle, after I saw the bugout kit for sale at d&l and I thought mabee the 24 inch would get me just that much more accuracy and a flatter trajectory.....


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PostPosted: Sun Sep 29, 2013 9:08 pm 
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Location: Edmonton
I have been told many times by many people that on a 22xx or similar conversion, a 24" barrel is overkill (i.e., offers no relevant improvement in accuracy or power compared to the 18" barrel) and just makes the gun harder to handle (un-carbine-like).

$0.00


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PostPosted: Sun Sep 29, 2013 10:08 pm 
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Location: Kebekistan
unless you have a flat top piston and a modified valve and transfer port ( witch would make your 2289 a restricted firearm) going over 18" will make less power ...

the only good thing with a 24" barrel is that your 2289 will be really quiet


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PostPosted: Tue Oct 01, 2013 11:17 am 
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Location: Richmond, BC
ktmrider wrote:
unless you have a flat top piston and a modified valve and transfer port ( witch would make your 2289 a restricted firearm) going over 18" will make less power ...

the only good thing with a 24" barrel is that your 2289 will be really quiet



How is that so?? I dont notice a difference with my 14 and 18 inch barreled pumpers..


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PostPosted: Wed Oct 02, 2013 8:54 pm 
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if you test it with a chrony you should notice a small augmentation of fps from 14" to 18" but after that your valve dosen't provide enough air to keep accelerating


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PostPosted: Thu Oct 03, 2013 4:36 am 
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ktmrider wrote:
if you test it with a chrony you should notice a small augmentation of fps from 14" to 18" but after that your valve dosen't provide enough air to keep accelerating

Except with a HPA kit. $$$$$$$$$ Don.t keep track, It'll scare ya.

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PostPosted: Thu Oct 03, 2013 6:47 am 
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"the only good thing with a 24" barrel is that your 2289 will be really quiet"

Is this true?? thats what I was curious about... is it because the pellet wont make it out fast enough?


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PostPosted: Thu Oct 03, 2013 7:26 am 
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trickster2000 wrote:
"the only good thing with a 24" barrel is that your 2289 will be really quiet"

Is this true?? thats what I was curious about... is it because the pellet wont make it out fast enough?


Could it be true ? Like i said my 2289 did not go over 500fps with the 24"barrel and flat top piston kit but i dont think is less noisy, maybe because the muzzle in a 14-18" barrel is closer to u than the 24" u think the 24" is not loud as the shorter barrel ?

When i put a long muzzle brake on my 2289 i though it work as a silencer till somebody else shot the gun and i was standing on the side then i new the gun was loud as it was before i just couldnt hear it behind the gun

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crosman 2240 (modded to target pistol)
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PostPosted: Thu Oct 03, 2013 8:56 am 
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Location: Coalmont BC
I'm getting really tired of people quoting stuff they read on the internet as gospel.... How effective a 24" barrel is at increasing the velocity is relative to how much power the gun is producing.... If you pump a 2289 three times you may not notice a difference, and in fact the 24" might be slower.... By the time you have a 13XX or 22XX shooting at PAL velocities, I can almost guarantee that the longer barrel WILL increase velocities.... By the time you get up to 700-800 fps the difference between an 18" and 24" barrel may be close to 100 fps....

I'll give you a hint.... If your gun is noisy, adding a longer barrel will increase the velocity.... The muzzle blast is proof that there is still enough residual pressure that a longer barrel will make use of it.... The noisier it is, the more advantage there will be.... My experience with the 22XX series is that velocities keep increasing with barrel length up to 24" on CO2, even with stock valve.... although on a stocker the increase from 18" to 24" is relatively small (20-30 fps)....

Bob

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PostPosted: Thu Oct 03, 2013 9:12 am 
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well said Bob. :wink:

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PostPosted: Thu Oct 03, 2013 9:21 am 
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joe hickey wrote:
Barrel length does not necessarily mean better accuracy. The edgun is I believe a 12" barrel and we all know what that gun can do. I have a 14" and 18" for my 2240 and 2289 and both are equally accurate.


This is a good point and something people often overlook as well, if your after speed a longer may help in the right case, but accuracy is related to barrel length.

The TX200 HC has 9.53" barrel, which is shorter than a 1377 barrel at around 10.25" :lol:

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