Re: 300 RUM or 338 RUM?? Which and why???
Depending on your intentions both are great but in the longer ranges the 338 will carry a little more energy load and is less overbore adding to barrel life. they will both do you well and provide plenty of energy for most of everything thing in N.A. up to 1000 yds .But if you intend to carry things out any further I would go with 338, a lil extra energy is never a bad thing. There is also an option to neck up 300 RUM brass to 338/300 or 338 Edge. this will provide and extra 50-100 fps than the 338 RUM making it equal or in some instances a little faster than the 338 Lapua. For some reason Remington made modifications to the 338 rum case making it in short unable to hold as much powder as the 300 Rum from what ive heard.