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Air Gun Home Forum Index » Pistols » what pressure for a 2240 mod?    View previous topic :: View next topic  what pressure for a 2240 mod?   Posted: Fri Apr 15, 2011 11:43 am Griz Member Joined: 16 Mar 2011 Posts: 36 Location: Colorado Springs, CO I'm looking at buying and moding a 2240, well a 2300 custom, with a bulk air tank. First question is what pressure will the 2300 handle? Is 1600 psi too high? Do I need to replace the valve? I'm intending on adding a pressure adjuster, got a suggestion? I'm a total newb at this, on the one hand I really want to mod something, make it my own, and on the other I want to be able to hunt ground squirrel, rabbit & pigeon. I really like the look of the 22XX carbine mods I've seen, and bulk HPA makes sense to me. Am I making some sort of mistake thinking I can use a 22XX carbine to hunt with? Thanks Griz   Posted: Fri Apr 15, 2011 12:18 pm rsterne Moderator Joined: 15 Jan 2008 Posts: 2998 Location: Coalmont, BC The first thing you need to realize is that the valve in a 22XX is NOT located to withstand the pressure of an HPA conversion.... It is only located by one small 6-40 screw.... The valve in a Discovery, for example, is mounted by three 8-32 screws set down flush with the valve so that the heads of the screws distribute the load over a very large area of the tube wall.... At a minimum, you need to attach the valve to the tube in a similar manner.... The tube in the Disco, which is the same dimensions as the 22XX tube, is safe at 2000 psi.... However, a 2240 tube has a safety roll-stamp that weakens the wall.... I think possibly a 2300 tube is silk-screened instead of stamped.... you need to check on that.... I would personally stay under 1600 psi and make sure that the gun is protected by a 1.8K burst disc so that the disc will fail and protect the gun in the event of a regulator failure.... Bob _________________ Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since! Airsonal: Too many to count!   Posted: Fri Apr 15, 2011 12:28 pm oddtodd Silver Status Member Joined: 30 Dec 2008 Posts: 2029 Location: Richmond, IN USA Both the 2300 and the 2400 are both silk screened. I've got both. _________________ Airguns: Two starlings talking "Larry, did you hear that? Larry?? LARRY!!!!"   Posted: Fri Apr 15, 2011 1:22 pm Griz Member Joined: 16 Mar 2011 Posts: 36 Location: Colorado Springs, CO rsterne wrote: The tube in the Disco, which is the same dimensions as the 22XX tube, is safe at 2000 psi.... Bob Is it possible to mount a Discovery tube on a 2300? If that's the case then I don't need to do any other mods, or do I? Griz   Posted: Fri Apr 15, 2011 1:38 pm rsterne Moderator Joined: 15 Jan 2008 Posts: 2998 Location: Coalmont, BC Yes, it will bolt right onto the trigger group etc.... It is, however, much longer (the same length as a 24" barrel).... You should also get a Disco valve and mounting screws to go with it.... and you may as well get the Disco fill fitting and cover.... You will also need a gauge block and gauge (to plug the hole in the tube).... and the Disco one is the obvious choice.... and don't forget the Disco hammer spring.... The Disco tube has a rearward location for the tiny 4-48 screw under the bolt compared to the 22XXs I have seen.... the screw is still under the bolt when it is cocked.... If you haven't got a steel breech, you may want to get one from a Disco as well.... Bob _________________ Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since! Airsonal: Too many to count!   Posted: Fri Apr 15, 2011 2:01 pm Griz Member Joined: 16 Mar 2011 Posts: 36 Location: Colorado Springs, CO I had planned on getting the 24" barrel on the 2300 so the length of the tube is not a problem. And I was thinking about the whole "tube assembley" tube, valve & fill cap, though I had not thought about the gauge & gauge block, which means I'd have to make a custom fore end to accommodate the gauge. Where would you go about getting all these parts? The Disco tube is not regulated is it? Griz   Posted: Fri Apr 15, 2011 7:18 pm rsterne Moderator Joined: 15 Jan 2008 Posts: 2998 Location: Coalmont, BC Nope, not regulated.... Crosman if in the USA.... AirGunEric if in Canada.... Bob _________________ Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since! Airsonal: Too many to count! what pressure for a 2240 mod?     Air Gun Home Forum Index » Pistols You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum All times are GMT - 5 Hours   Page 1 of 1   All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First  Select a forum Main Forums----------------AirGunHome Q&AGeneral Air Gun Questions and TopicsPicture GalleryTarget Shooting: Casual, Fun and CompetitionHunting, Pest Control, Varminting People/Events/Airgun Issue Discussion----------------Introduce YourselfThe BS TopicClubs/Events/Regional/Political Airgun Issues Maintenance, Modification and Reviews----------------RiflesPistolsAntique, Collector and Novelty AirgunsBB GunsPellets/AmmoOpticsAccessoriesAirgun Smithing Buy, Sell or Trade Forums----------------For SaleWant to Buy   Note: If you are seeing "Please enter your username and password to log in." 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