This is great advice, and what I do. Zero with the LR load, walk around with controlled expansion.Up to you, but I think there may be another option you aren't considering: carry two different types of bullets. I have also chosen the 208 Bergers as my bullet of choice in my new 300 Norma Improved, but I don't have any personal kill results with it yet since I just had it built. I've used other Bergers before on Elk and they've typically worked well. However, like you and others here, I figured that bullet leaving about 3300fps may not do well on an elk shoulder at 100 yards - and you can't always be picky on the angle when they pop-up in the timber near you. Solution: I chamber something like a Nosler partition or Swift A-frame for my walk to and from my long range "perch", because you just never know when Mr. Bull may come to you. Once I get out there, I can switch to my Bergers. (I tend to keep them warm in a pocket until I'm ready to shoot anyway, just to minimize the chances of a temp-affected change). Obviously, the close-range load still needs to have a similar enough POI to hit your target, but my partition load wasn't that far off of where my Bergers hit at closer ranges - they were at least minute-of-elk for those first few hundred yards.
I guess it depends on if you plan on a lot of walking and a mixed-range hunt, or if you will have a spot where you will be primarily LRH, unless you happen to have a dedicated rifle for each of those cases. For more of a mixed-range hunt I may consider more of a possible compromise one-size-fits-all bullet, like some mentioned. However, for a mostly long-range dedicated rifle and planned long-range hunt, but with the contingency of handling a surprise short-range shot, I prefer the 2-bullet approach, especially if you already have a 1/3 MOA load and bullet that should do very well at range. Not pushing my approach on anyone...just tossing out an option that hasn't been mentioned, and that I think works well for me.
I have been using the 212 ELDXs im my 300 ultra with retumbo running 3150. I work for an outfitter hunting elk and between myself and clients with that recipe in the past two seasons it has taken 8 elk from 300 to 750 yards and has performed excellent for me.
I would reccommend the 200 grain Nosler Partition for 0 - 700 yards at your 3150 FPS muzzle velocity . It should penetrate , expand , and exit at those yardages .I have used 200 gr Accubonds at about 3150 FPS with Retumbo in a 300 RUM. I have not shot an elk with that combo but I have shot two moose, both within 50 yards. Both moose took more than one bullet and, on both, at least one of the bullets came apart and failed to get good penetration. I just don’t think there is a bullet out there that will perform perfectly, all of the time, from close range out to 700 yards or beyond.
I don't shoot them in the legs. we have taken some shoulder shots and it performs excellent and bread basket shots almost always have an exit hole.That’s great info. Any issues with direct hits on leg bones? It has worked excellent in my 06 but never thought it’d be tough enough for my RUM.