If you hit a deer too far forward, in the front shoulder, you want a tough fixed-blade, cut-on-contact or chisel-tip head that’s optimized for penetration, because it’ll need to punch through heavy muscle and probably bone to get to the vitals. On the other hand, if you hit it too far back, toward the paunch, penetration isn’t an issue. Just about any broadhead will zip through that soft tissue. What you need in this case is to make as big a hole as possible—and you want a really good blood trail, because the deer is not going to die right away. For that, a mechanical head with a large cutting diameter makes more sense. Same goes for a high shot, which is common for treestand hunters who don’t bend enough at the waist, and generally whenever the deer in question reacts to the shot. A high hit is notorious for producing a light blood trail, and while you won’t necessarily fix that with a wide-cutting mechanical, you’ll likely maximize the blood you do have to follow in order to find your deer.