Fixed broadheads, hands down. Mechanicals were designed for those who don't have the knowledge or time to tune their setup. Mechanicals have too many variables like the angle of the shot, bone or soft tissue impact and dramatic loss of energy on impact. Purchase a quality fixed broadhead and take the time to tune your equipment and you will have a more reliable setup. If you are like me and spend a good deal of time scouting and preparing for a hunt, the last thing I want to have is a broadhead that may not perform when the big guy is standing broadside at 20 yards.