Even though you didn't ask, I'll give my opinion based on experience. Weatherby is all about hyper-velocity. If you want to fire a .300 Weatherby Mag, get the Mark V, or some other rifle with the 26" barrel. If you plan to purchase a Vanguard, get the .300 Win Mag and save your money and shoulder. And yes, the Mark V is worth the extra money if you reload. It is a profusely strong action. It is worth the extra money, if you can afford to shoot Weatherby ammo, at the extra cost.
Oh, and yes, considerable recoil, but tolerable. And the .300 Wea Mag hits like a loaded freight train. It, and the other Weatherby cartridges, are accurately advertised as one-shot, one kill. I never had to shoot twice. Then, I haven't had to shoot twice with my .270 Win, or my .300 Win Mag. Oh yeah, and my own Weatherby Mark V, 24" barrel, is chambered in .300 Win Mag. I sold my .300 Wea Mag.
JMHO,
Geno