Re pass thru’s.
A barnes with a huge frontal area often stops under the hide on the far side. Not so often ime on deer, but have seen this on a couple elk out of a small total # of elk kills.
Theres lots of info on what it takes to get more penetration out of a frangible bullet—it takes a heavier bullet relative to the caliber. So a 77gr .224 or a 108gr 6mm will probably penetrate deeper than a 130 gr .308. I cant help with quantifying that, but that’s ^^ been discussed ad nauseum here.
Agreed on the discussion re: penetration being ad nauseaum! But what I'm asking is:
Is there any actual testing or large sample-size documented field data showing differences between various bullets at various calibers in terms of ability to reliably create exit wounds for better tracking and blood trails? The kind of data I'm looking for and which I think would help settle this discussion would be a listing of a bullet at x caliber and velocity with average penetration depth on valid gel.
For example, a series of gel tests that results in the following type of data set:
Hornady ELDX, 6mm, 2500 fps impact, average penetration 15"
Hornady ELDX, 6.5mm, 2400 fps impact, average penetration 6"
Hornady ELDX, 7mm, 2300 fps impact, average penetration 18"
Hornady ELDX, .308, 2200 fps impact, average penetration 20"
(these numbers are totally fabricated,, this is just an example!) In a perfect world this would be extended to include various impact velocities as well and would also include average volume of permanent wound cavity. (or at least z" x y") Then one could choose caliber and bullet based on one's own desire to balance larger permanent wound cavity creation with more reliable exiting.
One possible way to start to assemble real data would be to go thorough the .223/.243 pages and document number of exits versus non exits. That would probably give us pretty darn reliable data about the various small/ frangible loads and their average ability to penetrate through ungulates. Maybe in my spare time!
I do get that at some point this is just gun geeking for gun geekings sake and what we all need to be doing is doing field simulation practice at the range and shooting more animals! Having said that I gotta go to the range!