Ya know, quite some time back I burned up a lot off ammunition trying out that "closer to the rifleing = better accuracy" thing.
Anything more then .030 off the lands was verboten! I finally came to the same conclusion I more recently have come to with reguard to bullet runout.
Since I ain't a bench rest shooter, if it groups around an inch I don't worry about it!
Maybe, after trying everything else, if I couldn't get a rifle to group I'd play with OAL. But if I were in your situation I'd seat to the crimping grove and see how it shoots.
I've got a Browning Low Wall that won't group at all if the bullets are anywhere near the lands. It likes 'em
way off. But my experience is with jacketed bullets. I dunno about cast...
