I want to make a case forming trim die for the 44 automag cartridge, from 30-06 and .308 cases. I have a lathe, and a 1" diameter rifle barrel stub. After I bore to .470, and thread to 7/8X14, can this steel be hardened enough to resist a file? I was planning to heat with an oxy/acetelyne torch, and quench in oil.
I had considered buying a 44 mag trim die, which is slightly smaller in diameter, and honing it out, but I wanted to try this first.