In the beginning Roy Weatherby made rifles on whatever action he had available. This was prior to him developing the Mark V action. The mauser actioned rifle is a good one and it's definitely worth buying a new stock. The 270 Weatherby Magnum caliber is an excellent flat shooting caliber with less recoil than a 7MM Remington Magnum. In the rifle you own the twist rate of the rifling will be 1 in 12. So it may not properly stabilize bullets over 140 grains. Nevertheless, you have an excellent rifle worth much more than the $80 your Grandfather paid for it. Weatherby ammo can be a bit expensive but Federal makes loads for you rifle that are cheaper and very good. Have fun with your new rifle.