I had my heart set on the crossfire and I could not get them to fly right. I went back to the proshop and we tried 6 different heads. Everyone of the other head flew right with my field points. The crossfires were hitting about 7 inches low at 20 yards. We spent over an hour trying different things and he finally just took the crossfires back. He contacted NAP about it 3 times but they never returned his calls. I have always been a NAP fan. I used thurderheads until this year. I just wanted to try something new and smaller. I have not heard of anyone else having this problem but then again I haven't checked into it much.