I've got shot shells for all of my revolvers and even for my Glock in 9mm and .45 ACP.
But I have yet to see a rat/snake, even a big one, shake off a simple load from a 22LR. They just cannot handle it. As such, the shot shells I have for the other pistols are over 10 years old. No need to ever shoot the larger loads and worry about finding some plugs or muffs for hearing protection.
Is there another use I need to be looking at for these shot shells?