This year was my first time using the Killzones and I was very impressed with the entry/exit wound and blood on the buck i shot... Half of the deers lung was hanging out of his body.. made for a nice and easy track job...
I shot a coyote with the RX 2.3 a couple of weeks ago, and it performed flawlessly. Huge entry and exit holes, and he died 10 yards away from where I shot him. The only downside is that one of the blades got bent in the process, so that head is now retired.