Ok 6gt guys. I am having a barrel spun up probably 17 inch. I have a couple lbs of accurate 1680. Would I be able to use this powder with Berger 105 for 200 rnds of barrel break in? If so what would be a starting charge weight. Just want to use up so older powder. Also. I have a defiance action. Do I really have to change firing pin hole and get it sleeved? If that is the correct word.
Thanks
Thanks