I love the 6.5x55 and use it as my deer rifle. Any thing deer sized down it gets the nod as my first choice. That would also include black bears. I also took it on my first cow elk hunt a few years back and wouldn't hesitate to use it for that purpose or on Moose if the opportunity presented itself. I must admit, that the .30-06 would be my first choice for elk & moose but I wouldn't feel severely undergunned with the 6.5x55, especially if it was running a premium bullet.
But if we are talking grizzly, no I wouldn't choose to use the 6.5x55 given the option of a .30-06. I've never hunted grizzlies, but I'd feel a bit of trepidation going into the brush with only a 6.5x55...
Could say it better.
