So last night I couldn't find the shell holder used with my Hornaday case trimmer, which I use as a handle while annealing by hand... because I'm obviously a guy with a new lathe so I'll just drill out this shell holder that fits, but the center hole is to small.... well, this is definitely a case of just because you can doesn't mean you should.... I got that hole in there and it works but I won't be doing it again..... pushed up a bur on the inside that required more effort to fix than it was worth. Gotta try everything once just to know why it's a bad idea..... they are also very hard