When i first got my muzzleloader i found there was just as many bad reviews on powerbelts as there were good ones. Personally i shot a 150lb sow in the shoulder inside of 10 yards with a 245gr powerbelt copper clad aero tip. the exit hole was the same size as the entry hole, and she ran about 200 yards into the nastiest palmetto patch green swamp has to offer, with only a few specs of blood near the end. Had i been thinking i would have just popped her in the noggin and saved myself a lot of dragging. My point is the shot placement was spot on, and i broke ribs on both sides, but got no measurable expansion. I am looking to try either the platinums or the aero lites myself to hopefully get better expansion.