I like Ramshot Sillhoette in all my auto pistols. This powder was originally Winchester Action Pistol (WAP). Don't know the whole story, but Win dropped it and Ramshot picked up the formula. The powder looks like a flattened ball, and very fine grained. It meters great and there are good loads from 380 to 45acp. I loaded 5500 9mm last summer for practice for the only big 3 gun match I shoot, they all went bang. should have loaded that many 223, my rifle shooting was terrible