If you wanna kill 'em retail, rather than wholesale, you can use my "carpenter bee" load. Probably overkill on wasps, since carpenter bees are approximately the size of Kaiser rolls.
Speer .44 shot capsule loaded with #9 shot. I use 7 1/2 for carpenter bees, as I don't want to have them turn and charge. I think the additional pellet count is needed, since you need to really need to darken the sky with lead. Load it in a .44spl case over ~ 4gr of Unique. Kills 'em hammer dead, out of a 3" 629 Trail Boss. I understand that longer barrels actually give worse patterns, so if you have a long-tom revolver, you'll have to stalk even closer.
Even tho' I'm from AL, I don't have any good recipes yet.