If you are serious about hunting the big bears there are far better cartridge choices than the 7mmremmag.I would use va minimum of a 300 magnum with the .338 being a better choice yet.If you really must have the most penetration available with a 7mm bullet you might want to try the failsafes even though they are not made in weights heavier than 160gr. I have seen several animals shot with the 140gr failsafe and the penetration was the best that I have seen with a 7mm bullet of any weight or style including the heavier partitions.