Primer Impulse and its effect on Bullets

[Seabeeken]

A long but interesting read on the effect of primer impulse on bullet jump and engraving. Long range hunter and comp guys might be interested. From Army Research Lab on 5.56 and 308 rounds

 

[RidgeTop]

Great, now we know the anatomy of a squibb.

Interesting how the brisance is diminished in the slightly older primer.