Sounds like you will hunting on a bait stand. If that' s the case then I suggest you use a big-bore 45/70 , 450 Marlin or a 444 Marlin. Also use a good scope because the best bear seem to come in--- right at dark. I used a 30/06 with 180 grain bullet on my bear hunts here in Colorado, back when it was legal to bait. To be honest any deer cartridge will work, 300 savage, 35 remington, 270, 280 etc. I don' t think I would use a 243/ 6mm.

You want to anchor the bear on the spot if possible. Break the shoulders and tear up the heart/lungs. It' s been my exiperence that the bear will bleed only a short distance then stop. I think the hair mats up & acts like a blotter. Its no fun looking for a wounded bear.