I've killed dozens of deer with both mechanicals and fixed blades.I've never lost a deer with a mechanical butI have experienced a lack of penetration on a few shots.I've broken blades or had the blades almost fall out at least 50% of the time.I've never gut shot a deer so I can't see how a wide mechanical would ever have been a benefit on a questiobale shot.I've never not had a fixed blade completely penetrate,regardless of the angle,even through heavy bone.I've never broken a blade with a fixed position head.In fact,last fall Ikilled a 10 point,two doe and a mature gobbler with the same slick trick.Most deer I shoot,fall with sight regardless of the head but my 3 longest blood trails were with mechanicals.All three shots were good butI broke blades each time.Still none of the deer went more than 150 yards.I've never noticed the deer dying or going down any faster with a 1.75" jackhammer or a 4 bladed slick trick or muzzy.With a good quality fixed head,I always expect full penetrationwith a complete passthrough and a broadhead that's still intact to cause the most amount of damage the entire way through an animal.

Blood trails are directly related to the angle and position of the wounds.Even with a perfect shot,I've seen sparse blood trails with rifles,mechanicals and fixed blades.In my experience,the type of broadhead used,has no direct link to the amount of blood you can expect to find.Hair,fat and body organs can all plug up a hole.

Mechanical broadheads will certainly kill deer but to say they're superior to fixed headsis ludicrous.