My Mauser tells me the load is too hot when the primer pockets are loose.
If a primer falls out at the range, I am 2~4 grains too hot.
A more accurate way is to measure the extractor groove expansion.
.001" of change will not make the primer fall out in one or two firings, but it is still too much.
Knowing that the 1892 Mauser case head design is at it's limit at 65kpsi in the 270Win, also corresponds with the Quickload pressure predictions 65k ~ 70k psi, when I get extractor groove expansion in .243, 257RAI, 7x57, .308, 30-06, and 8x57.
The fact that Quickload is estimating the velocities right on the money with what the chrono says is also giving me faith that the pressure.
I know someone who can do Von Misses calcultions on stress in the case head and he says,
[ QUOTE ]
The Mauser case head nominal condition chamber pressure for the initiation of case head yielding with H06 C26000 brass is: 76,977 psi
[/ QUOTE ]
picture of brass overloaded in a Mauser