Re: 300 or 338
well, you can go for more capacity in the .30 cal (compared to the 300 win) or less than the .338 RUM/edge. Im thinking that a 300 Rum would do you well. The less obvious choice would be something along the lines of a .340 Wby or .330 dakota.
What action are you useing? The .338 SIN may fit the bill nicely, a little faster than the .340 WBY but not as fast as a .338 RUM.
I feel the 300 RUM is great for no brake, or a real fun gun to shoot with a brake.barrel life is the downer, but its not to bad.