Ask the gun shop to put a 300 Weatherby shell in it... problem solved...and NOT A 300 WM.... Because it will chamber! And leave A TON OF HEADSPACE and other space!There is a local gun shop near me, it has an older Mark V and the barrel is only stamped 300 magnum. I like the gun and I don’t know if that 300 wby mag or 300 win mag.
But you said it is a (Weatherby) Mark V, and he answered for Winchester Model 70. I doubt that Weatherby ever made rifles in a Model 70 action. Does anybody know differently?I guess there is another option too