I've read through 4 pages, and only about 3 folks opted for anything less than .30 caliber. I took the advice of a friend and tried to simplify my loading by moving to just one caliber. I picked the 7mm because of the bullet choices and the high ballistic coefficients.
A 7mm WSM does everything but grizly just fine with less recoil. I use 168 VLD Bergers for everything. Just for fun I tried it on javelina. It worked just the same as my 7mm TCU, but at longer distance. DRT kills on elk at 340 yards.
If I were choosing today, I'd be very tempted by a 6.5. No, even if I had hair, I wouldn't wear a man bun.
If I were in grizzly country, I'd opt for a .45-70.