A few years back in Colorado we killed 2 bulls and a buck in 2 days with a 28 Nosler pushing 175 ELD-X just over 3000fps. Crazy thing is, the bulls were at 1,240yds and 1,170yds (2 hunters, 1 gun, 2 bulls out of the same herd). Excellent results on those 2 elk at extended ranges. We weren't able to recover bullets on those bulls, but the bullets expanded and did their job well.
The next day, I killed a muley at under 200 yards in the timber with the same rifle. That bullet was a true pinhole. Dropped the buck in his tracks, luckily, but not even a single drop of blood on him. Couldn't figure out where I hit him until we got him skinned out.
It just goes to show, there are enough variables in hunting situations, you can't take every anecdotal experience as gospel.
That being said, I think the pinhole was a true anomaly. ELD-X would be among my first choices for close quarters elk. They will often come apart to some degree with high velocity impacts, but still penetrate and hold together much better than most of your thinner jacketed match grade bullets. I think there are better options for true long range applications.
On the flip side, I killed a bull at under 100yds with a 6.5 PRC and 147 ELDM going 2970 in WY a couple years ago. Slight quartering shot with very little penetration, but what penetration it had was epically devastating. The bull took 2 steps and tipped over. Definitely operating at the margin of performance for that bullet, but what it lacked in penetration, it made up for in energy and sheer explosive trauma. That bullet's sweet spot for performance on game is 500 and out.