There should be a "line" on the barrel and the bucking that will sit in the groove so that your bucking is right side up.... If it's not then that would explain the veering to the right consistently. As far as better accuracy, use .28 if not .30g. It does make the BB move slower but IMO the tradeoff in punching power to go through brush and the increased accuracy in effective range are worth it. (NB: Going to a heavier BB actually lowers overall maximum range however increases effective range).
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE