NOt sure why they aren't getting passthroughs but my guess its not the broadhead. I have shot mechanicals quite a bit and taken alot of deer with them and can only remember a couple that didn't passthrough and those were usually due to hitting the off shoulder on quartering away shot. So Don't just assume that just because they are shooting mechanicals is the reason they aren't getting passthroughs. If they are indeed shooting lower poundage so they can hold back the weight longer for the camera that would explain alot especially if they are shooting Mechanical heads as you need the speed and energy for them.