had one 20+ years ago. worked perfect for about 300rds and started noticing case heads crooked, as in the whole head being several degrees off 90. think I melted it on the stove or something
I had one that I bought in college in the late 90's, just for the purpose of having a cheap .22 to blast away with. Eventually, it started doubling and tripling so much that I was afraid of serving federal time for an NFA violation. It wound up going to a Chicago gun buyback at a profit.