cut-on-contact style head, which is why I shoot Magnus Stingers. They fly great and penetrate equally as good
But they don't leave a good enough blood trail IMO. I shot 4 deer with them during the 2003 season and while I LOVED the head and penetration was awesome, the blood trails sucked, all of them. I had to really work the trail to find the deer, all 4 double lung pass throughs.