Originally Posted by Lapua guy
What dies do you use?
I know everybody has their own method for fire forming cases, and I certainly respect that. Myself, I like to set the head space up a little snug to where I can feel slightly more resistence when closing the bolt than normal (not a lot more but a little. This tells me the body of the case is solid. Then I try to seat somekind of a long cheap bullet out as far as I can go (hope it just touches the lands). I like a good dense load that generates a lot of chamber pressure (43.0 grains of AA4350 works well with a 105 grain bullet in the 6mm). If the first couple case show a slight banana in the body, increase the load another grain of powder. Still there, then try 4831 at a max load. I have fire formed with 115 grain bullets and 43 grains of AA 4350 as well
Redding sells dies, and you can also get them by special order from Forster for about the same money, but machined to fit your chamber. Just send them three once fored cases