Has anyone here actually tried pouring gasoline down a snake hole? I've read that they are incredibly resistant to gas fumes.
I wouldn't suggest lighting any gas that you've poured down a hole. That could be dangerous, I bet. To you, as well as to the snake.
One poster said that the right solution is a Ruger 10-22 and a fifty round drum, or some such. I understand that the Ruger isn't too accurate right out of the box, but if you need 50 shots to kill a rattler with one, better buy a Marlin M-795SS instead. Mine is certainly accurate enough not to need more than 2-3 shots to kill most snakes. One will surely do it, if a good brain hit.

Actually, the most accurate .22 auto rifle I've shot was a Weatherby Mark XXII. Wish that I still had it. With that, you could probably pick the heat sensory pit that you wanted to put a bullet into, if the snake held still a few seconds.
Have any of you shot a coiled snake with a powerful handgun, like a .357 or .44 Magnum? I once shot a lizard with a Hi-Standard .22, and the impact of that little .22 bullet blew the lizard several feet away. Maybe he made a final convlusive leap as the bullet struck? Anyway, what was the effect of the bullet on the snake? Did it actually move it away from where it was?
And there's this bit of trivia. Mexicans sometimes call rattlers snakes "con cuatro narices". (With four nostrils.) They don't grasp that two of those "nostrils" are heat-sensng pits. Further south, people think the Tropical Rattler (
Crotalus durissus) can break a man's neck with a strike. It's really because the highly neurotoxic venom affects the neck muscles, causing the victim's head to roll and droop. Bushmaster (
Lachesis muta) bites sometimes do that too, with the same rumor associated with them.
Oh: I took a good look at the head markings of the snakes in the photos. They are different snakes.