I made some cases for my 260 from some Federal 308 brass wanting to experiment with thicker necks. Well Federal brass sucked. Had to use a 7-08 die and then a 260 die and I still had partial shoulder collapse problems. I ran PPU 308 brass through a 260 die one pass no problems. The loaded federal rounds all had 20-30 thousandths runout! I shot all fifteen into the same group to see how bad it was going to be and the group ended up being just under 1.5 inches. Could have used it for hunting. The PPU rounds were perfect so I didn't shoot them up to straighten the cases.