I have taken 4 bear with my .308 at ranges from 10feet to 200 yds. without a single problem. All one shot kills. I have used 150 gr. core-lokt but they tend to fragment quite a bit. Had better luck with 180gr Nosler partitions holding together and not destroying meat when the frag.

I have used my Remington Model 600 Marksman in .308 to take deer, bear and elk out to 400 yds without a hitch. Knowing my rifle and bullet placement is crucial at longer ranges. Just make sure your friend is comfortable with his rifle and can shoot it well and there is no worries.