Needing shoulder surgery at some point in my future, I sold off my 300 WM and 338 WM and 'dropped' down to a Win Model 70 sporter 1-9" twist 26" barreled 264.
Finding a load that shot the way I wanted was a bit of trial and error. I tried: I4831, RL26, H1000, I7828 and finally settled on RL33.
With RL 33 I'm pushing the 142 ABLR to 3200 fps (via magnetospeed measurements) with an SD of 14. I usually only fire 2 rounds then let the thin barrel cool off. Shooting groups in this manner gives me .5-.75" groups at 100. Playing with it out to 600 yards I'm figuring the B.C. on the ABLR is closer to .62-.630 though.
Used it to drop a pretty large 5x5 bull elk this year. First shot through the back of the shoulders at 137 yards dropped him right there. He got up and just stood there, dead on his feet. I learned early on, if he's standing or still acting like he wants to get up, plug him again, so, I did. Second shot entered the ham, through the pelvis traveled at an angle through the body and stopped on the inside of the off-side shoulder. That bullet was recovered and weighed 60 gr. I figured that bullet went through about 5 feet of elk and poked a nice hole in the pelvis and did what it needed to.
I also took a small white tail doe at 400 with it, punching through both shoulders. DRT with little blood shot meat.
FWIW, I also use that bullet in a 6.5x55 at 2800. Took a good sized axis doe at 109 yards that was DRT with a shot just behind the shoulder. .264" entry wound and .5" exit with little blood-shot meat.
I have no experience with the ELD series though.