Re: Which 338?
If 500-600 yds is the longest shot you'll take on an elk, most of the 338's would work fine. However, if I was you, and I'm not, I'd go with the 338 RUM. Not a wildcat, so don't have to deal with that, but plenty of power out to over 1000yds for elk. This would allow you to shoot longer as your skills, knowledge and equipment improve. JMHO. Good luck in your choice.
Many of us are waiting expectantly on the new .338 Berger bullet. Supposed to shoot in a 10 twist just fine and reportedly had a very high BC and Berger bullets are typically not expensive to boot.
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