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http://www.gunblast.com/Marlin-1895SBL.htm6+1, recoil pad, big loop lever, stainless, and XS sights.
45-70 would be way better then a 308..... You're more then likely only going to get one shot off if that in a self defense case against a mad/surprised bear..... A side arm of heavy caliber would be way better...
Hard to beat a 12ga shotgun for that.
They used to make that gun in the .450 Marlin. Wonder why they aren't doing that anymore. My guide buddy in BC absolutely loves his. He's taken three grizzlies that I know of with his.
There's no doubt plenty have folks have used a 12ga and survived. They are affordable, simple and reliable. A person just needs to decide where their comfort level is.