Quote:
Originally Posted by hyz980517
wait, so 10 inch barrel is enough?
i was about to build a dmr with full cylinder air volume and a 455mm prommy barrel, u know, taking the advantage of full cylinder so i can push .30g or .32g bbs.
need your advice about full cylinder question. cuz if 10 inch is enough i'd always go half size cylinders for them.
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5" of barrel is enough. In the 400fps range, you really don't need a lot of barrel to get that BB up to speed and centered.
You only need to lengthen the barrel as the muzzle energy goes up, just to have the length to accelerate the BB without using really high air pressures.
The reason I don't run a 16" DMR is because my 10.5" MK18 shoots just as well as any DMR.
As far as "pushing" .30s or .32s, you can just use a ported cylinder for a slightly longer barrel and maintain steady muzzle energy between .20s and .32s on a very short barrel. Or you might even get a bit of joule creep.