Ben, I tried a couple of the mini drill presses, both now reside in a scrap metal bin. I went with a hand drill and ended up making a drill guide with a 1/2" Jacobs chuck and stops on both rails. Got the consistent finished length and pressure on OSC I wanted as well as the crimp consistently "square" to the hull. Finished shells are very uniform and look correct. My power tool is a 1/2" drill/driver and I run it on the driver setting. Tons of torque and doesn't want to burn or melt the hulls. I think all that are successful with this has gotten there by trial and error! If it works good it IS good.
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