Originally Posted by
Outpost75
Case head measurement for pressure isn't going to give safe or meaningful results in low-pressure handgun calibers and it is only marginally useful in full charge rifle loads.
In high pressure rifle rounds like the .308 Win., 5.56 and .270 Winchester, taking the same new or once-fired case and repeatedly reloading it until the primer pocket appears looser by feel is a better indicator.
If the primer pocket in a .30-'06 case stays snug for ten reloads the load is safe. A .270 or 5.56 might not make ten reloads in a full charge, but absolutely should not be noticeably looser and easy to seat a primer after five.
If primers seat easily after five reloads the charge is WAY too hot!