Growing up, I knew a WWII and Korean War vet who said the 45 ACP snake shot was really useful in the Pacific where they really had a big rat problem. I think I still have a couple of boxes of surplus WWII 45 ACP some place.
Could you take a picture of those?
I'd love to see them.
Way too cool.
One of the biggest issues is coping with rifling. The spin induced by rifling tends to blow the patterns out. I shot three gun with a 12 gauge and 1-1/4 ounce of 6s and a rifles barrel and could not knock over a 6" x 6" x 3/8" steel plate at 10 yards. Went to a second shotgun and even cylinder bore decisively flattened those targets.