frizz ,
barnes offers a 6mm/.243 caliber bullet in a 115 gr. wieght round nose if he' s interested in handloading. it' s one of the ( o ) series or originals , it says it' s suppose to retain about 70% to 90% of it' s original wieght , and expands more than 200%
i' ve no experience with it but , i just wanted to add that little tidbit in

but in my opinion , i wouldn' t go after any type of bear with a small bore , where i hunt i get about 50 yards to take a shot in and if the first bullet doesn' t take it down , you might not get a second chance.