I can’t find evidence in this discussion that the broadhead or the arrow had anything to do with this and plenty of guys are finding penetration nearly as good sometimes better with light / mid, higher speed setups… search youtube. My bet would be the Spitfires opened up just fine (Spitfires work fine), but that quartered towards is almost always a bad shot to take, either hit the shoulder or go back a bit and miss too much of the vitals to drop em fast. If you did hit that dot deer is very likely to be dead somewhere but will cover ground first, not sure the actual survival rate of single lung glances. Where my broadhead search has landed at present is good flying fixed heads like QAD and Ramcats, I’m sick of keeping big fixed blades tuned and wondering if my treestand shot angle is gonna throw that tune out the window. Shot selection is primary, gear selection is secondary. Who knows tho, he may turn up any minute dead or alive.