I second Dave Kings experience.
For "near" Long Range (to 600 yards) I use the 260 Nosler ABs, ahead of 101 g of 4831 SC in my .375 R.U.M..
It is a screamer, as flat as a .270!
It usally prints 3 shots into sub half inch at 100 yards when I do my part. At 600 yards I can rapidly shoot 5 shots into 6", or sometimes even less.
I am going to hunt moose, caribou, and maybe griz (solo 15 day float) this fall here in Alaska. I chose the .375 RUM over my other RUMs due to the fact that a close encounter with a griz up here is a real threat, and the kinetic energy from its muzzle to 100 yards is devastating with the 350 g Woodleigh.
But for the LR stuff I will switch to 260 Nosler Accubonds.
I will post the results.
The picture is with the 350 g Woodleighs. Smashing energy, although I have yet to shoot past 300 yards. They did well there with 3 shots going into 3".
The recoil is abit stiff!