You will gain about 300-400 fps over the Win Mag or the Weatherby number. If I already had one of the more common ones, I personallly would not buy one. Shells are expensive and you will find them only at full service gun stores so far. If you need the extra range and recoil then it would be a good buy as thier price at least in a Remington rifle is pretty reasonable. As far as hunting goes a Moose or Bear would not notice the defference in any of the 300 Mags.