I somehow missed getting a copy of the 1969 Speer manual, but do have the 1974 (9th) edition. By then they had decided to use actual pressure-test equipment, probably at the urging of SAAMI. The maximum velocity for 175-grain bullets is 2875 fps, from a 24" barrel.
Uhh, when did we change from 7 RM to 300 WM ?
Originally Posted by Mule Deer
Interesting. What length barrel?
Just looked at Hodgdon's data for 180-grain bullets in the .300 Winchester Magnum, and from today's standard 24" barrel they don't list any 180-grain loads that get 3070 fps.
