My mind is definately goin but isn't the 7.62 by 54 the old NATO round? Know to you as the .308.
More than enough for any blackie.
ORIGINAL: younggun308
Use the 45-70 or the 30-06, not that Russky Commie stuff.
If you'll kill bear, use the all-American classic. 8mm Mauser, though, is an American spoil of war, and seems to be a nice cartridge.