Originally Posted by lonyaeger
Question: why do they do that?
Ammo anticipated to be fired in a machine gun is normally primer crimped. A dislodged primer would be very bad Ju Ju in a combat situation.
Remember, Speer is owner by ATK, who also owns Federal. They operate the Lake City ammunition plant for the DoD. Chances are the Speer ammo was loaded on the same machines that crank out the LC ammo for the military. It is set up to apply the primer crimp so they just keep that setting.