3/4in Sch80 for PB Sniper

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Postby PotatoNick » Sun Mar 13, 2005 12:18 am

I remember reading that there was always someone asking about pb snipers so i decided not to post in pneumatics. I checked harvel and they said 3/4" sch80 has an avg I.D. of .702 would this be alright to use on paintballs since they are .68 caliber. has anyone ever used 3/4 in sch80 for a pb sniper barrel?
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Postby clide » Sun Mar 13, 2005 12:45 am

Either you have a typo or you need to check Harvel agian. 3/4" sch80 has an avg ID of .722". Which makes quite a difference. 3/4" CTS CPVC is usually even easier to find then 3/4" sch80 (have CPVC at ever hardware store around me) and it will work a lot better. avg ID of .695 according to harvel.
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Postby PotatoNick » Sun Mar 13, 2005 12:50 am

i just kind of guessed/remebered on the .702, isn't cpvc in sdr instead of sch?? i saw someone using sdr11 and they said it worked pretty well. thanx for the help
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Postby clide » Sun Mar 13, 2005 1:32 am

No, CPVC is CTS (copper tube size), but 1/2" sdr 13.5 works just as well. It has an avg ID of .696"

Edit: note that the CPVC needs to be 3/4" and the sdr 13.5 1/2". The plus side of sdr is that it fits in standard PVC fitting, but it is more flimsy than the CPVC
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Postby PotatoNick » Sun Mar 13, 2005 1:39 am

what about 3/4" copper pipe? what can i sleeve 3/4" cpvc into?
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Postby Rex_R » Sun Mar 13, 2005 1:48 am

if you use a piece of 1"x2" for a stock/barrel rest you don't need to sleeve it. just get some pipe hangers. one advantage of using pipe hangers is its fairly easy to make a breach loading pb gun.
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Postby PotatoNick » Sun Mar 13, 2005 1:53 am

how do i make it breech loading?
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Postby Rex_R » Sun Mar 13, 2005 2:17 am

lets see(wanders off to fetch gun, returns) I used a 2" to 1" threaded bushing, into that a 1x3/4 threaded bushing(thus far all pvc). I then cut a 1/2" long(roughly) piece of 3/4" 'HC- SDR11 cpvc' and ran a piece of .06 safety wire as a ball stop(keeps the pb's from falling into the chamber), on the barrel is a 3/4" cpvc threaded adapter(male) that threads into the pvc(the inside of the adapter is beveled so the pbs don't catch on it). there is a homemade e-clip between barrel an adptr to keep the balls from just rolling down the barrel(made from some 0.032" dia music wire). to load one unscrews the 'barrel' and slides it forward, plop a pb into the chamber side, then screws the barrel back in (hand tight), and you're ready for the next shot. neat thing is, I can shorten the gun by about 1.5' by snapping the barrel out of the hangers( assembeled its about 6.5' long.
edit added wire size after measurement.
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Postby PotatoNick » Sun Mar 13, 2005 3:16 am

what about the way where you just slide a tee over it? i think thats what i'm going to do, maybe put a little section of pipe in the tee so its like a clip
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Postby utcpyro » Sun Mar 13, 2005 11:02 am

If you still want to sleave it, 3/4" CTS CPVC firts inside 1" SCH80 the best that I was able to find. There is still a good bit of space around it though. It looks like SRD 21 3/4" would work as well, but that stuff would not give you too much support wise.
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