benchracer
Well-Known Member
- Joined
- Dec 18, 2009
- Messages
- 1,659
When I began loading for 5.56, I quickly ran into problems with pierced primers completely absent other pressure signs. After doing some research, I switched to magnum primers and the issue went away. Mag primers have thicker cups and are able to withstand the higher pressures of NATO spec loads. My research also indicated that the mil-spec primers are themselves mag primers.
Here is an article from John Calhoon on the subject of the various small rifle primers and their pressure tolerance:
Primers And Pressure
Here is an article from John Calhoon on the subject of the various small rifle primers and their pressure tolerance:
Primers And Pressure