sorry for the slow reply.
could you explain to me why the inserts on the epics and pro hunters are better than the ones on the axis?
With the Axis HIT insert, the shaft bears the brunt of the impact force, carbon is great , but not for repeated impact, there were a lot of people gluing 1/2 an inch of aluminum shaft around the end to reduce "fray" and increase the impact reisitance of the axis . Axis , if they are going to break, will do it right along the back of the HIT insert....this is rare and they break due to severe impact.....but they do break. The HP will usually just separate.....you re-inseret, check for damage and shoot again.
Good luck if you don't put an Axis insert in correctly.
The HP insert is more easily removed/repositioned if needed. Especially nice with the Pro Hunter, but you can do it with the Epic if you only heat a field point in the insert. It also has a longer bearing surface, so as long as the end of the shaft is straight, it will align better. The HP also is less likely to get glue in the threads, you don't need to squeegee the end of the shaft out with a special tool. Also, seating an HP insert is exact....you settle the flange down and all shafts are the same.....HIT inserts can and do vary depending on glue viscosity. You can rotate the HP while inserting it to ensure uniform glue coverage a lot easier than a HIT insert also. Their long bearing surface and design make them settle in the shaft well, so broadheads spin and balance easily. Axis tend to vary a bit more lot to lot also.
Don't get me wrong, the Axis is a great shaft. But it does not shoot any better than the Epic....and the Epic is cheaper and a lot easier to work with.
The Axis will take side impact a bit better, but they are not noticeably stronger in my experience.
IMO the Pro Hunter is the best C/A shaft ever made for hunting......but they cost like heck , and it would take an exceptional shooter to realize the accuracy advantages.
Hope this didn't confuse the issue.