From Speer #14 with 175 grain bullets...
7mm-08 Rem......... 2628 fps
7 x 57........... ...... 2596 fps
280 Rem............... 2644 fps
The difference between the fastest and slowest is less than 50 fps.
The 7mm-08 Remington barrel length was 24 inches.
......7 x 57......................................... 22
..... 280 Remington.............................. 24
Two inches in barrel length could account for 50 fps.
The 7mm-08 is loaded to 52,000 CUP.
......7 x 57................... 50,000 CUP.
......280 Rem................ 60,000 PSI.
The normal loading warnings are in writing along with a statement that normal U.S. maximum pressures for the 7 x 57 are 46,000 CUP but the Speer 7 x 57 loads match European standards and should not be used in Remington Rolling-Blocks or 93/95 Mausers. The 7 x 57 max loads 50,000 CUP pressures match 30-06 max load pressures.
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