Magnum versus standard LP primer

[crockett]

I prep the primer pockets the first (re)load with the RCBS 90375 Case Prep Center and their carbide pocket uniformer that allows to set the seating depth of the primer.

[RedTeam98]

I have used REM 7.5 BR Small Rifle primers in my Fed Nickle Small Primer Pocket Brass with excellent results for my 45 Super loads at 800 FPE with 250gr XTP on Longshot 9.8 gr.

[The_Shadow]

I also use the RCBS carbide pocket uniformers for Large & Small primer pockets.
That became a necessity when dealing with military staked/crimped primer pockets and even some cases with smaller than standard sizes.  They do an amazing job but mine are set at standard pocket sizes.
I hated having crushed/damaged primers especially with supply and cost.
I even changed the way I seated primers in the military and or staked/crimped primer cases which has serve to install primers without damage.