In the time it takes to draw, aim, and fire, you could easily step out of striking range of most snakes. When I first moved to AZ, with its bakers dozen of rattlesnake species, I carried a .357 with the first two chambers loaded with snake shot. It eventually dawned on me that despite having encountered many rattlers, in no circumstances would a gun have provided any "protection", and I quit this practice. My closest encounter occurred while trying to sort out the tracks of several bears around the edge of an earthen stock tank, and while starting to kneel to spread aside some grass, nearly planted my knee on a coiled, resting, Arizona Black rattler, which I think never knew I was there. Vigilance is way more important than weaponry.