I carry one of two guns. A Glock 20 loaded with 200 grain hard cast or FMJ. Also, a red hawk 4.2 inch barrel loaded with 360 grain cast performance bullets. Two years ago I was charged by a eight or 900 pound cow moose and stopped it with four shots from the Glock 20 loaded with 200 Grain FMJ...
We used to shoot at the range in Pennsylvania on very hot humid evenings. There was a creek nearby and one guy there used to soak a towel and put on the barrel of his 300 Weatherby Magnum. Well long story short he ruined the barrel by doing that. I would not use water on a barrel.