I've put everything from 410 to 12ga and .177 to .50 caliber down range, typically shooting 5.56, 30-30, 7.62, .45 and 9mm, typically at silhouettes, wood logs, target clays, but occasionally pumpkins, watermelons, gallon jugs with ballistic gel. I've also hunted, typically with my 30-30 lever action.

You can't compare the impact on a ballistic gel torso with a head, because it has no muscle and it weighs significantly less. You can't compare the impact on any object of 5 or 10 or 15 or 20 or 100 lb let alone a neck shot on someone who weighs approximately 200 pounds.

That bullet went thru 'clean' in that it didn't hit any significant bone structure. It still tore apart his arteries which is why the blood rushed out so quickly, then the footage cut.

A shot like that on dear with a 30-30 round or a.45 in a similar spot wouldn't blow their head off. It would just drop the deer dead in its tracks. If you propped it up on a chair when it got shot, it would look pretty damn close

Tldr; a bullets impact on a similarly composed 50lb target will be much more exaggerated than the impact on a real 200lb target