The 7mm Weatherby is capable of somewhat more velocity, due to the "freebore" (longer throat) than the short throat in the 7mm RM. SAAMI also allows the 7mm Wby.. a 65,000 PSI Maximum average pressure, versus 61,000 for the 7mm RM. This, plus the 26" barrels often used on Weatherby rifles, often results in a 100+ fps advantage tor the Weatherby.
And as I have noted a few times here and there, everybody "knows" another 100 fps of muzzle velocity makes a VAST difference in "killing power".....
No it doesn't make much difference in killing power, a magnum should have magnum velocity. The 7mm original got 3070 fps with 175 grain bullet according to the chronograph rest from Speer in 1969 Throating issues seems to be why the 7 mag was watered down
Last edited by jwp475; 05/14/21.
I got banned on another web site for a debate that happened on this site. That's a first
