Its a bit caliber sensitive, larger calibers start kicking ass around the 2200fps mark but things iin the more normal 7- 7.62 mm range come alive at 2600 fps.. with boringly regular bullets its more or less the threshold for the phenomena commonly called hydra-stadic shock. I’d rather use “stunning” instead of shock but tomato/tomoughto. I’ll not go into an discussion about whether it exists , or whether its reliable, or whether the name is technically correct, or whether shock is the right word but we all know that sometimes animals hit through the boiler room often go down deader faster than an animal with the top of its head shot off. Theres a lot more to the nervous system than the CNS. The autonomic plexes are bundles of nerves that basically are hard wired. You don’t have to remind your heart to beat, or your digestive tract to work, and just about every day you can go to sleep without dieing. If you had an elephant on an operating table you could take it out with a scalpel, but you probably don’t and neither do I. Out of the three main thorasic plexes my favourite is the vagous nerve. It wanders around like a vagabond doing a bunch of things and on females ends at the cervix. That almost describes my idea of a perfect life.

It would be a better story if it ended at the other /other C word, but then apparently lots of guys couldn’t find it.
What were we talking about again? Oh, so anyways, it goes so far to explaining why heavy for caliber mild caliber guys insist that fatally shot game almost always runs, normal range magnum velocity guys think they’re full of kaka. Might explain gut shots that kill instantly from all visual cues. Goes a long to explaining why the bush range hunter with a 30-06 shooting whatever standard factory ammo is on sale can’t comprehend why someone else might want more gun. How about hits just above the heart killing way faster than one square through the pump. Jack O’Connor explained that one me to when I was 8; he didn’t know why, and I didn’t care then but he wasn’t wrong.
Or maybe it doesn’t explain anything, I had fun typing it anyway.