I wonder what the velocity difference would be with factory ammo? Some years ago I chronographed ( an Oehler) some 7 mm Remington Mag. 150gr factory stuff out of a Mod.700 that barely broke 2900fps.
SIL and I both reload. That said, I do have a partial box of 160g Partitions from back in the 1980's before I got started reloading.
M7 7mm RM loads are 300fps faster than my .280 Rem loads using the same 140g bullets.
