Clays is pretty darn fast, noticeably faster than Bullseye, so they keep tight reins on the data. I've had some excellent loads with SWC's and Clays, just nothing on the warm side. Complete, clean burn even at the lightest levels. Comparable to N310.I was looking at the load data for Clays compared to HP-38 (which I have been using). I was surprised how much lower the range is for Clays