2240 with simple HPA set-up?

.22LRGUY

.22LRGUY

CGN Ultra frequent flyer
Rating - 100%
177   0   1
Location
Ontario
Hey guys...I do some "pest" work inside barns, and like to use my QB-79 above about 15C. Deadly accurate, cheap to shoot, compact enough, etc. When CO2 is no longer a viable choice due to cold temps, I reach for a Chinese springer with a droopy barrel and sloppy sights. Gets the job done, but it's heavy...and a bad candidate for mounting a scope. I always liked the 2240, but sold mine years ago after I grew tired of cold weather performance...but as a platform, I think it could be a nice, compact gun for what I do. I'd like to bottle-feed a 2240 HPA, get one of the Crosman plastic stocks, etc. Maybe a longer barrel...who knows. If you have a 2240 (or QB-79) set-up for HPA, I'd love to see your gun. Maybe buy it too! :)

I have a couple of scopes sitting on the shelf...looking for something to do, but neither are rated for spring piston air rifles. If they were, I'd be looking for an inexpensive .22cal Crosman springer.

Open to ideas. Love to see some photos/stories. If you've built-up a gun...links to parts/suppliers would be great!
 
Only problem is you cannot do much to these airguns without breaking 500 FPS, then become restricted firearms.

"scopes and ammo" sells a lot of parts for the 2240 and 13XX/22XX series.
 
500 fps (or even 450) in 22 is plenty for what I'm doing. Any idea as to whether or not HPA with the standard 2240 barrel length would keep it @/under 500?
 
.22LRGUY said:
500 fps (or even 450) in 22 is plenty for what I'm doing. Any idea as to whether or not HPA with the standard 2240 barrel length would keep it @/under 500?
Click to expand...

http://www.pyramydair.com/blog/2014/07/crosman-2240-conversion-to-air-part-2/

From what I read should be fine.

Back in 2010, I did a test of the CO2 2240 pistol, so I have the recorded velocities for this exact pistol on CO2. It averaged 448 f.p.s. with Crosman Premiers. On 2000 psi air, the first shot was 468 f.p.s. It increased to a maximum of 492 f.p.s. by shot 7 and dropped back to 466 f.p.s. by shot 15. At the end of the string, the gun was still holding 1200 psi of air pressure. The average velocity of 15 shots was 486 f.p.s., which means air boosted the average velocity of this pellet by 39 f.p.s.
Click to expand...

Alloy pellets will also push over the limit.
 
Thanks! I have a PAL of course, lots of rimfires...so no desire to be pushing any boundaries with an air gun. Looks like I should be OK.

Cheers!
 
You can get a hipac from the states to convert it to HPA. Easiest way.

ht tp://www.powermaxhipac.com/5--hipac-s.html

There are also "dummy" CO2's floating around ebay that you can connect an airline to, but then you still need a tank to pressurize it.

As for a QB79 running on HPA, this is mine...

78cfb84e-d7ed-4a64-a173-68d0356f9386_zps65b80243.jpg


3000 psi, regulated to 1200. This is a shot string from it...

QB79-ShotString.jpg
 
One VERY important consideration is to make sure you use a regulated air supply, with the regulator set to CO2 pressures. There are some air guns out there that will deal with the high pressures, but Crosmans mostly ain't that.

It is actually possible to fire the guts out of one of these Crosman guns with too much pressure, esp. if there has been any other work done. Some digging around the airgun site may well enlighten you to this problem. The guts going out the front of the gun is a dangerous nuisance, while the guts being fire out the rear could cost you an eye or worse.
There have been a few self-proclaimed air-smiths that have done changes that were very very unsafe, and it sorta behooves ya to be aware and educate yerself.

Pretty much any Paintball magazine will have a huge assortment of advertisers carrying most if not all the parts you need to for the conversion.

Cheers
Trev
 
Thanks for the replies everyone~greatly appreciated. Thinking about it...I think I ought to try and get the QB eating HPA...IDKJ's rifle is about the ideal set-up...so I've PM'd you IDKJ.. :)
 
You must log in or register to reply here.
Back
Top Bottom