I've got some Montec I've had a while but never hunted yet. Believe I'll go with them, no doubt a CoC head is all around best!
Just anecdotal advice.......... But I had a Montec fail to penetrate on a (hard) quartering away shot on a GOOD whitetail at about 15 yards one time. Placed the shot about one rib from the back. Shoulda exited the far armpit. Instead........the arrow ran under the hide but outside the ribcage and the head lodged in the near armpit. It's a shot I've made several times with various other heads............Steelforce.........the old Razorbak 5........... Rocky Mt............