counter bore it. I have a 8mm mauser that had the same condition, and I countered bored it 1/4" with a 3/8" rotery bur in my hand drill. Made all the difference. Yours being 1/2" would be a lathe job.
counter bore it. I have a 8mm mauser that had the same condition, and I countered bored it 1/4" with a 3/8" rotery bur in my hand drill. Made all the difference. Yours being 1/2" would be a lathe job.