i got some papers from an older friend and used them for squirrels. they were probably from the sixties, i have also blasted off some buck shot from the same era, without any problems.
on the other hand last year i was sighting in my slug gun with the brand new hornady saboted slugs, the first two shots were fine except from not being on target, but the third one sounded only like a pop with no recoil. i waited five minutes, ejected the shell and saw the crimp was burned around the edges. i took the barrel off my 870 and saw it was blocked, so i took a rod and pushed out the obstruction. it was the saboted slug. i guess they forgot to put powder in the shell and the primer blew the round four inches into my barrel.
it still scared me a little
just be cautious testing new stuff