One of the highest scoring grizzlies ever killed was killed by a native woman with a .22 rimfire.Does that make a .22 rimfire a good grizzly cartridge?I would never say that the 7mmremmag will not kill a large bear because large bears have been killed with the 7mmremmag.I would however say that there are better choices than the 7mmremmag for hunting the big bears.Take a look at the cartridges used by the people that guide clients on hunts for the big bears and tell me how common the 7mmremmag is.The guides that I have met carried cartridges from the 300mags to the 338's on up to the 375's.Why do they not carry smaller calibers?