Mike,
Your technique for converting the 40-65 brass rim to the thicker 10.5 rim worked like a charm. Thank you.
I was taught most of what I know about precision machining by a great retired aerospace machinist who died way too soon. However, he did infect me with a love for fine machines and I've never met one that I didn't love.
The fire formed cases will accept a .422" pin gauge but not a .423". I plan to start with a .420" diameter bullet but am unsure as to the shape and weight. The bullets were said to be from 260 gr to 298 gr. in COW. One thought was to cast .300 gr bullets at .420" diameter and cut the bullet back until a proper weight is reached. I did this with the 405 WCF bullets that I used for fire forming as it seemed quicker than making multiple dies.
Any other options for finding the right bullet.
Otto
