i shot them into a foam target today. They all penatrated about the same. The muzzy 4 blade penatrade the most and had the smalles hole, the 3 blade didnt make it quit as far thru as the 4 blad but it made a bigger hole and the mechanical didnt go all the way thru the target but it knocked a big hole in it. Now i just gotta figure out which one i need, thinking about keeping all three in my arsenal in the tree and maybe ill be able to pick my shot...who knows