One of the things you have to watch with the BP roll crimper is that it is designed to be used with a counterclockwise turn. So, if you use a hand held drill it has to be in the reversing mode. After struggling with mine for a couple of years making less than perfect roll crimps, I happened to look at the paper that came with it and in large letters it says, use it counter clockwise. The Reloading Specialties roll crimper is a clockwise design so it can be used readily in a drill press. John
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