Primer pockets are small and the brass itself requires more force to resize.
I sort brass by the head stamp. S&B is one of my premium match grade brass in both 9mm and 45ACP. Tighter primer pockets last longer before its too loose and primers start failing out. Thicker walls hold bullet tight longer too. If its not mixed with other head stamp the force is uniform and ammo is very consistent. Reloading on HDY LnL progressive press. Haven't seen the crushed primers yet.
