Barrel must point forward. Really important, that!
Uhhh...Maybe if you cough up a little more in the way of detail as to what you are trying to accomplish, eh? Good questions get good answers, while leaving folks guessing as to what you are trying to get done, leaves you subject to the whims of pretty much every git with a keyboard and half a cup of coffee into him (that'd be me!

).
Caliber, barrel used,maker, old or new, bullet manufacturer, cast or swaged, etc? What game are you trying to build for? BPCR? LR Target? Etc.
Cheers
Trev[/QUOTE
do you have any info for this question or just blabbing? i too am interested