I have the .300 RUM in a Remington 700 LSS that I won at a Ducks Unlimited dinner (on my birthday no less) in 2004.

I don't have much use for it since I don't get to go Elk hunting as much as I'd like, but I have shot some game with it and (this rifle at least) is deadly accurate with the factory barrel, which I believe is 24" long.

Obviously the best way to acquire rifles is to get them for free, or for $100.00 worth of raffle tickets, but good luck however and whatever you choose.