sweet we got a bit more power with the carbon barrel vs the smaller id aluminum barrel with the smaller ammo and around the same with grimburg juls and the stock barrel.
WOOT WOOT WOOT THANK YOU for this my tests were not as good, as i explained to you earlier - i used the whole 22" which as you said was a wee bit too long and air gets de[pleted someway with the detent and such, so kewl thanks im gunna get going with the lathe work now - 9.9 g seemed to good to 82j & 75 j great test ! cant wait to see results in a hdr68 !