I have purchased the Buffalo Bore 255gr Hard Cast as well as Double Tap 255gr hard cast for my HP .45 ACP. I also carry a .357 with Double Tap 200gr hard cast rounds. I consider both adequate defense against NC Black Bears which do grow to the size of grizzly's here. They typically do not hibernate here in NC and have a year round food supply. That said, it is very rare to have a black bear attack here in NC, but we have had more recently do to the bear population growth as well as neighborhood expansion into their territories. We've even seen them here in the Greensboro area on occasion.