I agreed to purchase a 7mm Weatherby today and was looking at Nosler data. They are showing in many cases 8-9 grains in additional powder charges for the Weatherby over the Remington and significantly more velocity with the Weatherby, but are listing case capacity as identical.
Interesting that powder charges are that much higher with the Weatherby round. I have never loaded for a Weatherby, but the one I played with did 3200 with 160s and both Weatherby and Federal factory ammo.
I don't think you'll see 3200 FPS out of that 22" bbl, but who knows?
