I am thinking of making a copper QEV gun and I was wondering what the ratio of the volume of the chamber to the volume of the barrel should be.
another thing I was wondering was if there is any rifled barrels around .30 caliber for fifty dollars or less.
Posted: Sat Oct 11, 2008 5:41 am
by POLAND_SPUD
1. the ratio depends on the pressure you are planning to use.... the higher the pressure the smaller the chamber V can be....
of course the bigger the chamber the more power you'll get but a rule of diminishing returns (or something like that) applies here so you won't get much power increase above a certain ratio...
what is more, there are certain advantages of using smaller chamber V: =pumping the gun will take less time
=the gun will be more quiet
why not rifle the barrel yourself
it isn't that difficult
and with a 100 ml chamber you need at least 8-10 bars for good power
about half a litre will be fine if you have a compressor a bit more would be better
Posted: Tue Nov 18, 2008 11:23 pm
by Bando_Red
I don't mean to revive a dead topic,but I'm in a similar situation with an extra problem.I'm not so great at ratios,so I don't know what the hell kind of QEV to get.All I know is the ammo I'll be using is .177 pellets.
Posted: Tue Nov 18, 2008 11:31 pm
by FordGtMan
Bando, you wont be needing anything larger than a 1/4" QEV for .177. anything larger will just be a waste.
Posted: Thu Nov 20, 2008 5:23 am
by Baldwin1993
hey dudes..
any1 know how to make a qev??
HELP lol
if you have a compressor a bit more would be better
