Stingers use a heeled bullet just like every other .22 lr.
So I had to trudge over the moat surrounding my man-cave, down its bunker, and dig down 3 feet of dirt to dig out my stash of CCI Stingers.
Well, I guess we are both right. CCI Stingers used to have a crimp. The pics show a box from <gasp> Sports Authority (which doesn't sell firearms any longer) from the 90's.
I also checked the new boxes...nope...no crimp...all smooth. Kinda sad actually. Country's going to hell in a hand-basket (and I say that only with a bit of tongue in cheek).