I had the exact same experience as you. I went back to fixed COC heads. Now I have to look for the arrow well past the deer or dig it out of the ground. I'll take an exit hole every time.
Just my 2 cents...if youre using a big cut mechanical, and combining it with a light arrow setup and not keeping your FOC in mind, and still expect the arrow to pass through and stick in the dirt.....youre setting yourself up for disappointment. I shoot 70lbs, 30" draw, 28" arrow that totals out to 443gr (50gr insert) and is between 13-15% FOC and shoot a big 2" cut mechanical, and everything I have shot with that setup stuck in the dirt, minus 2 deer (1 was quartering to and the arrow fell out of the exit hole 10yds from the shot, and the other went thru the offside shoulder joint, but did not penetrate hide on the offside) but given the circumstances of those 2 this was acceptable to me and both went down within 30yds. If you are concerned with your arrow sticking in the dirt, and you want to shoot a big cut mechanical like these killzones, the answer...to me at least....is simple: construct your arrows and bow setup to generate the energy needed to do so. I got with my bow tech this summer and told him what head I was planning on shooting and the results I expected and we built an arrow to deliver those results, and I couldn't be happier with my results thus far this season. Again, just my humble opinion.
