A while back, I had a weasel problem in my chicken coop. The 12 and 20 ga. were out of the question as were rifle and pistol for reasons of damage to the building. About the time I thought of .38 shot for my .357, I thought of my Kentucky .50. I loaded 30 gr. fffg, about the same #6 shot with a wad between and on top. Sat out in the coop for a while and BANG..end of problem.
When I get a new burn barrel, I usually ventilate it with buck and ball. 75 gr. ffg, .50 or .54 patched round ball with 6 or eight .32 round balls poured on top and a wad to hold it all together. It's not bird shot, but it makes a nice burn barrel with 2 or three shots. They used loads like this in the Civil War.