Ground squirrels, marmots, javalena, treed mtn lion, coyote, small deer w/in 25 yards. Has been proven on desperados' in saloons & indians in knife fights. Would most likely also work on infiltrating Taliban, Hamas & Columbian drug smugglers sneaking up the stairs.
Would also be a hell of a lot of fun at the next cowboy action shoot.
What does "gauge" mean anyway? As used here gauge means the number of round lead balls the same diameter as the inside of the barrel (aka the bore) that it would take to weigh one pound. It takes 12 lead balls the same diameter as a 12 gauge barrel to weigh a pound. The smaller 20 gauge would require 20 balls of that barrel diameter. The larger bore 12 gauge would require 12 lead balls of the bore diameter to weigh one pound.
In general the number of pellets in a shotgun shell...