Me and my friend harvested 3 deer in the past two seasons with .44 magnum rifles - I shoot a Ruger Carbine, he shoots a Marlin 1894. Two bucks and a doe shot at 15, 25 and 40 metres respectively. All pass throughs, all knockdowns. They weren't small deer either. The large diameter bullet transfers energy VERY effectively resulting in huge knockdown power and large blood trail (if you need to trail - Believe me when hit with the heavy slug at 1600+ FPS they drop fast) Fantastic round for under 100 yards - Maybe a little longer if you can keep it accurate. I find the leverevolution ammo is the most accurate. I haven't bagged a black bear yet with one (its on the list!) but I have no doubt it would be effective. Happy hunting! A side benefit of the round is that most rifles are smaller and lighter weight. Great for covering a lot of territory, in a blind or up a tree. Also you can shoot them indoors in the off season at most ranges to keep in practice. I have 4 44 rifles - Two Ruger Semi Autos, a Ruger 77/44 bolt, and a Winchester 94. Love em!