You should check out Slick Tricks. I used to be a Thunderhead man and had good luck with them, but always had to tweak the sights a little after using field tips. Not so with the Slick Tricks, they fly as advertised like field points. Slick Tricks 100 magnums are 4 bladed, extremely sharp and durable, they did a number on the 2 bucks that I took with them, 1 of them straight down through the spine and through the heart and the blades still looked great.