Wasp nests with my SW 642 .38 snub!
About 1/10 gr Bullseye, under a case full of ground walnut shell, with a toilet paper wad pressed in to hold it all together. Red dot on the wasps at about 4', squeeze and no more wasps nest, just mush and bits of nest settling to the ground.
I have cleaned lots of nests from my soffits, and from under the gunnels of my boat that way