I recall being next to a guy at the range back in the 70's (I was 14 and had just started hand loading for my 222). he was shooting a lever gun. I asked him what he was shooting and (I think) he said 219 Zipper. Never heard of it so I asked to see one. The fired cases he showed me all had many splits in the shoulder (not neck) and an appearance like a Weatherby case, radiused. Black soot all over. When I said "wow, gonna have to throw those out" he said "When I resize them it fixes them and it shoots fine". OMG. Even as a kid I had enough sense to pack up and leave. Horrifying.... So not my mistake, but really, some people should not be trusted with even Silli-Putty.