have heard of "hydrostatic shock", it was invented by Roy Weatherby to sell rifles. I can find no evidence in the blood vessels of animals shot with super high velocity loads.
Ok lets get this right? You have shot deer/game/whatever with a big/heavy/hardcast/whatever projectile at a slow speed like 1500fps and then shot one with a say 300weatherby broadsided and didn't see the bloodshot in the cavity while butchering?
If you answer yes, then I you hunt different animals than I do or butcher a totally different way than I do. The lungs are usually melted when shot with a 270 say at close range compared to a slug.