So I've got this Weatherby Vanguard in 300 Wby, I think the action is great. The barrel is not so great. If I'm going to have it re barreled tho', I'm thinking I might change the caliber. Don't get me wrong, I like 300 Wby (hell, that's why I bought the rifle), but there are things about it I don't like. Such as my damn bullets getting boogerd up in the magazine under recoil. That is why I'm thinking of 338 RUM, the case length. Of course these heavy recoiling rounds may always booger up bullets, no matter how much room they have in the magazine. However, without quoting a bunch of ballistics let me just say this. The way I figure it, and what I require of a round. I can easily call the 300 Wby a 1000 yard cartridge, the 338 RUM pushes out to right at 1500 yards. I let energy dictate, I try to hit an animal with 1000 ft lbs or more.