Well my Smith doesn't have a reamer for what I want so I have to buy a prefit. I see shilen and pacnor chamber a 7/300 Weatherby. Who else makes a prefit in this chamber
I've had the privelage of working with a 7-300 weatherby. Wicked caliber with Berger 180's and the new 195's. That rifle was a 9lb with scope set-up and was comfortable to shoot. Havn't killed anything with it yet but i bet it'll be a hammer.
Ballistically similar to the 7STW. Case capacities nearly identical.
Loading data for the 7STW will work fine providing you start low and work up as you should with any new cartridge.