Up Date on my problems
I just cast up some more 300 and 500 gr slugs today with a much softer alloy.
I had my die's checked and had a .462 die made up to squish them to the .460 dia. in stages.
I coated both the first 500gr slug and the .462 die with alox.
And the same thing happened. I smashed the slug so much that I had the take the die out and with a punch drive the slug back out. I did this twice.
I changed out the cupped punch for the gas checks with a flat punch. and what do you know every problem went away.
I set the machine up for the 300gr gas check slugs and used the cupped punch for them with no problem.
My conclusion is when you size and lube the heavy hitters use a flat punch to push em.
