Paddy
member
Trying to slug a 300aac barrel I have and it's proving tougher than I imagined. I pounded a ball of 000 buckshot through it and got a clean impression. But, the grooves are very faint on this barrel, and of course there are 5. So, my calipers tell me upon repeated measuring around the diameter either .305" or .306". Seems a bit tight?
Anyway my initial research indicates that accurate measurement of odd groove bores requires special equipment. I have some things, I don't have a V block. I have mics, dial indicators, and good calipers. Help!
Anyway my initial research indicates that accurate measurement of odd groove bores requires special equipment. I have some things, I don't have a V block. I have mics, dial indicators, and good calipers. Help!
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