Anybody ever done this? I watched it on You Tube and decided to give it a try. I had picked up close to 500 cases at the range over a coupe week period. I processed them like I normally wood, but, didnt realize that over half my brass was Lake city with crimps. So I tried it on about 20 cases and it seems to work good about 98% of the time. There were one or two that still had issues accepting primers after using the bit. The video is below.