Hang a small fender washer on a nail . Stick the nail in target backer. Heat the washer with a torch.
Much more precise aiming point than a hand warmer.
Yeah, that two shot check I posted above on that hand warmer shows just how horrible they can be for accuracy.
Most of the guys I've seen shooting thermals on base power are lucky to hit the hand warmer, but seem to do okay on hogs and coyotes...
