That sucker is dern near a smooth bore. I have no idea what it would be good for.
There are a lot of cheap barrels out there that would be more practical. Excluding using this one as a pry bar or cheater, I have no idea.
1:56: Maybe a .410 shot gun barrel, but a then you could probably find a single shot 410 for less money.
Oh second thought, one could chamber it for 50 Cal, put an end cap on it and make a black powder ONLY water cannon for some EOD unit. But there are cheaper ways to go about that also.
CPT USAR Ret
USAMU Sniper School Oct '78
Distinguished Rifle Badge 1071