I think if you don't get full penetration when using a mechanical head you should probaly EXPECT the head to be closed when you find your deer. You shoot and penetrate.....the deer runs.......deer often try to pull a arrow out......the arrow definetly will not penetrate any further than the original shot........any movement after the shot just gives the arrow a reason to backup.....its very easy for a mechanical to go backwards........move it an inch, and its closed! Id'd almost expect to find it closed.



Good Luck!

PRACTICE....PRACTICE....PRACTICE......SUCCESS!