ORIGINAL: stubblejumper
If 300 yards will be your max you don't need to load the 300 RUM to the gills.
If 300 yards will be your max the 300win mag or 300wsm would serve just as well with less recoil and longer barrel life.
Not jumping on you or anything stubble, but do you expect the guy to go out and sell the gun cause you see less recoil and longer barrel life in other guns? I guess the poor guy came asking about powders and ended up hearing people telling him he could do better with a different gun.