Okay, don't get too excited. This data is all my own. A pretty small statistical sample, but at least it is data. Most of the debate has been based on opinion, so hopefully we can shed some light on the issue. Here goes:
I have been a bow hunter since 1994. The first broadhead I used was the "Satellite T-N-T", a 4-blade cut on contact. It is a viscous head, but when I began to shoot faster bows I had problems with tuning. I switched to a 2-blade, rear opening, mechanical. First I shot the "Rocky Mtn. Snyper" then I moved to the "Rage-2".
In looking at my notes, I see that I have made 21 archery hits on whitetails. 10 were made with the fixed head and 11 were made with the mechanical (2 of those hits were on the same deer, so the actual number of kills is 10 for each). The following is a basic breakdown of how those broadheads performed.
Total Pass Through* : Non-Pass Through
Fixed = 8:2
Mechanical = 3:8
* "Total Pass Through" is defined here as a shot in which the entire arrow exits the deer and is left on the ground at the site of the hit.
Broadhead Pass Through** : Non-Pass Through
Fixed = 8:2
Mechanical = 7:4
** "Broadhead Pass Through" is defined here as a shot where at least the broadhead exits the far side of the animal.
Broadhead Intact : Broadhead Destroyed***
Fixed = 0:2
Mechanical = 4:0
*** Situations in which the broadhead itself did not exit and was broken to the point where it was no longer an effective cutting tool inside the animal.
Recovery : Non-recovery
Fixed = 8:2
Mechanical = 9:1
Note: All three deer that were not recovered were the result of total pass through shots. Also note that the deer that was hit by two mechanicals is listed as one event here.
Proper Performance : Failure
Fixed = 10:0
Mechanical = 11:0
Conclusions? Well I think it is hard to draw anything to settle the debate but it does add something to it. From the following data I will make several statements. Yes, my mechanicals penetrate less than my fixed blades. Yes, my mechanicals still produce an exit hole more often than not. No, my fixed blades are not tougher in the face of bone and interior organs than my mechanicals. Yes, my mechanicals are slightly more likely to result in a recovery and this is not influenced by penetration. No, my mechanicals are not likely to fail on impact.
So, your thoughts?
