Thanks guys, I feel like they will be a good head for me and will give them a try. I'll let you know how I make out. As for my setup, I am shooting an XI Impulse at 83 pounds, 28 inch 2413's, and I have killed 6-8 deer since using this setup and had a complete pass through every time, with my arrow burying into the ground most times. I also limit my shots to whithin 25 yards, and generally much closer than that. I don't believe penetration wil be a problem, just glad to hear they function properly from your experience.