I shot a few of the Ram Cats into the block target and haven't had a problem with blades breaking but the screws do loosen up and will have to be tightened after the shot. From what I have read they designed them to do that. They don't hit exactly like the field points but it was pretty cold and windy when I was trying them out. I'll play with them some more this weekend. Wish our deer season was still in as I am curious how they will act on one. They also seem to penetrate my block target about the same amount as field points.