Basically, looking to guess chamber force by thinking about the primers is like looking to guess how deep a lake is by sticking your toe in the h2o. Extensive decades back I went to the use of CCI primers from the magnum wide variety. The sole exception is CCI bench https://federalbenchrestprimers79012.angelinsblog.com/31187763/indicators-on-federal-primers-large-rifle-magnum-you-should-know