This broadhead will be different for every one.

The best blood trails come from the deer shot with the sharpest broadhead with the largest cutting diameter that you gan get to consistantlypass completely through both sides ofthe deer as low as possible, slices through both lungs with out damaging the heart and with out getting into the legs.

If the head is too large, given a particular set up, to pass through the deer then you only get one wound and the arrow likely restricts blood loss outside the body.

If the heart is punctured it stops pumping/ sprayingblood out and it simply drains resulting in less blood on the ground than if you just slice through both lungs.

If you get the legs the layers between the chest and legs clog up the hole and restricts the blood loss outside the deer.

If shot too high the blood must fill the chest cavity before it begins spraying the ground.