Depends on which G5 head you are talking about. The Montech's flew real nice out of my older slower Horton and I liked them. But flew real bad out of the newer SuperMax, was getting lots of flyer's from time to time. ON my Excal I have only shot the Tekan II's by G5 and have taken two deer with them. One fell within sight about thirty yards and the other went only seventy yards I think. They also had pretty good shots on them though and that helped as much as anything. Here is a pic of the Tekan II mark on the buck I shot this year!!!