Bears, especially grizzly bears, are another area for cartridge contention. For guiding purposes, or as a backup gun, it’s not a bad idea to tote something in the .338 to .416 range. But for hunting purposes, it’s simply not necessary. Bears will generally not be anchored in place with a single shot, no matter the caliber. You’ll hear stories of shooting bears in the shoulders to “break them down,” but I know of quite a few instances where bears were never recovered because of this method. Shoot them cleanly through both lungs and their fate is sealed, usually very quickly. For black bears, a .243 with a good, bonded bullet is absolutely deadly.