I'm using the Lee 170 RNFP (shoots great!) seated to the crimp grove. Rounds from the right side of the mag feed fine. Rounds from the left catch the nose of the boolit in the notch for the extractor and clip a very small piece of lead off. I've tried different seating depths with no change. I haven't tested to see how it affects groups as I usually single load. Might not be too bad for accuracy, but wanted to see if there was a simple fix I may be overlooking. Not sure if the round nose version of the boolit would be any better.