Hi, Here's hoping someone can help me with a little brass problem.
I recently purchased some used .308 lapua brass, fired unknown times.
I have full length sized the cases, cleaned and prepped. Then as I put the bullet in the cases, using lee seating die, the brass is buckling at the shoulder. As the bullet is seating, all feels well, then as I apply more pressure I can feel it go.
I am wondering if the brass is too soft ? As mentioned on a lee leaflet, could be excessively annealed. Also mentions the collet being closed ... however the seating dies doesn't appear to have a collet ? I have taken the die apart and given it a good clean.
Any help greatly appreciated. Alan.