Thank you...I figured it best to ask before I experiment. I had another 452460 that did the same thing...seems that Lyman made the front driving band and top grease groove "too square". But I bet that my method will solve the problem..won't hurt to try. Another method is to use a cast bullet... attach a screw to it and spin it (with a drill) in the cavity with some abrasives, but that will make the cavity larger.
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