I recently acquired a Rem 700 XCR II in .375 H&H Magnum and replaced the factory stock with a Bell & Carlson Medalist Sporter in Weatherby profile (I liked the idea of the Monte Carlo and the cast-off to help manage recoil). I took it to the range on Saturday for initial sight in after mounting one of my Zeiss Conquest 3-9x40 scopes and bore sighting it.
To begin, if you want to get the sight in right, you have to do it off a bench. I used my Caldwell Rock Front Rest, a nice rabbit-ear rear bag filled with heavy sand and, given the temp was just about 60*F, I wore a vest which freed my arms but gave me a little extra padding over a shooting shirt with a minimal shoulder pad. I'm an experienced shooter (and NRA instructor) so I:
1. made sure I had the buttstock firmly placed against my shoulder
2. had a solid cheek weld on the Monte Carlo (I had carefully adjusted the scope for a 4-1/2" eye relief and good sight picture with that cheek weld (a Tipton "Best" Vise is a good investment, as is a good set of Wheeler scope mounting tools and screwdrivers)
3. had a low bench seat so I could maintain a reasonably upright position with a slight forward lean and a good range of motion to absorb recoil
4. did a function test standing, even though I have shot heavy caliber rifles before to reacquaint my self with the recoil
Now I had prepared 60 rounds for test plus another 20-round box of Federal Premium with 260 gr Nosler AccuBond bullets. While one of my pals said these are great Cape Buffalo loads, I look at them as Elk/Moose/Brown Bear Loads.
Once I got to work, I quickly found that my 67.5gr of IMR 4895 under a 250gr Sierra GameKing was a great load that produced 0.67" 100-yard 3-shot groups. By end of test, my 69.0gr of RL 15 powder under a 260gr Nosler AccuBond produced several 3-shot groups slightly over 0.425" or 0.4 MOA groups. My .375 H&H Magnum is officially one of my three most accurate rifles...and a pleasure to shoot.
I'll quickly admit that the .375 H&H kicks...it's got about twice the recoil of my Savage 116 or Win M70 .30-06s. I was pretty tired by the end of my 40-round test and didn't get to my box of factory loads. The good news is that, with a 0.4 MOA load, I never have to play at the bench again. I will confine my further practice to my shoooting sticks and field positions. If you use good field positions with a .375 H&H or larger, you'll be able to manage with a solid shoulder fit, a good cheek weld, good scope clearance and reasonable forward lean with flexed knees.
The .375 H&H will take any game on earth if you do your job...you really won't need bigger.
Cheers,
FH