I have pressure measuring equipment, as well as a chronograph. And I have a 7x57 on a modern Zastava Mauser action.
The gas in the chamber cannot read the head stamp on the case.
The case head structure of 7x57 is identical with the 308, 270, and 30-06.
A cartridge case, barrel, and receiver design that will tolerate 62 KPSI from a 308 will also tolerate 62 KPSI from a 7x57.
In a modern action in good condition, loading the 7x57 to modern pressures is not hot rodding.
My standard 7x57 load is a 162 grain bullet at 2762 FPS and measured 56.1 KPSI pressure. That is nearly 6 KPSI (10%) below the maximum for a 308, and really quite conservative.
Last edited by denton; 02/09/20.
