I've shot elk with 223, 22-250, various 6.5's, 270's, 7mms, 300 Win, 300 WBY, 7 RUM, 338 RUM, and 45-70 loaded to bolt action specs.
If I had videos of all the elk I've hit and you didn't know the chambering or range you'd be hard pressed to tell the difference. A soft point 60gr in the 22 cals is actually surprisingly effective inside 300 yards, through the slats and so far they exit every time, I use a 223 Varmintmaster with kids often for elk and they drive tacks with it.
As I go up in cal I can gain range and I can broaden bullet construction and shot placement to a point and get the same effects.
If you pick shooting them broadside or quartering away, dead is dead with anything that makes it to the of side, target shoulder shots or quartering to and you have to use just enough to get an open bullet to the of side and IMO that's going to take the heaviest 30 cal or larger to do consistently. If your shooting them in the brown eye a large 338 or the 45 with a 520 gr solid does it well too.
The one thing for normal ranges I've seen that I'd call a wrecking ball on elk is the 45-70 ran at red line with a 300 gr hollow point, I've never shot an elk and not just seen legs kicking when I recovered from recoil, what's funny is that if I ran 350+ gr none hollow points and shot a deer they would run FOREVER, I pumped a mag full into a doe at 50 yards while she walked up a creek and I ran back to the truck and returned with a 22lr and she was still walking up the creek and it popped her.
I've shot a good number of whitetail with a 22lr right behind the shoulder and it's excellent, same with shooting Mt lions, 22lr or 22 mag to the heart/lungs trump a 44 mag.
Just so many variable to make a definitive statement out side what you see for yourself over multiple kills, an animal being able to hit fight or flight mode changes things also, I don't shoot elk until they are down, if I saw the hit was quality I let them run a little, they always stop then decide they are dead, keep shooting and they have a freakish ability to deside they aren't dead.