Not a ML story but I have been reading alot about the pass thrus and blood and deer running with dbl lung shots and such. I don't think there is always a clear cut answer. I shot a basket 8 this year in Ohio at 25yrds and it was a dbl lung pass thru with a muzzy. It jumped went 20yrds stopped for maybe 5-10 seconds and feel over stiff legged like a spine shot from a firearm with no blood between the spot of impact and final resting place. So sometimes I believe the shot can be good, the bullet good, and they run a long way with or without a blood trail. A not so good shot with a supposedly bad bullet and they drop in their tracks. Go figure