Hey Everyone,
I have been intending to slug barrels on the guns I am going to cast for. I just have not gotten a round tuit yet.
I did recover a cast, powder coated boolit that I fired from my 9mm carbine and did some measuring. I was a bit surprised to find that the "groves" portion measured .3535 compared to the un-fired bullets measuring .3558-.3560
The recovered bullet was intact except for the rifling marks, a few dings a powder residue on the base. The powder coating held up admirably. Very little silver showing on the recovered bullet.
Is this a valid indication of my bore size? Am I spot on size wise with .3559 (avg) in a .3535 bore?
Thanks.
S.