Absolutely no doubt that the 6.5x55 would work,many grizzlies have been killed with small calibres,and as Dwayne says without doubt many have been taken in BC with the .303 British and ball ammo over the years.Shot placement would be critical of course,and with adequate backup,in an open enviornment there should be no problem.An up close,unexpected meeting with a big bear would leave me wanting more horsepower,I pack an 8mmRemMag,with 220gr A Frames! Monashee
