Hi Muzz I have not used the ELD-X in my 280AI but I have a friend that uses them in his 7 mm mag. along with H1000 powder he advised that accuracy wise they are top shelf and like the ABLR they like quite a bit of jump.
Kevin did not use his 7mm mag this year for hunting so I am not sure what the ELD-X is like for terminal performance other than what DrMike already stated from a post that was recently on the forum.
Muzz have you tried the 150gr. ABLRs? They look to be the bullet that I am going to be using in my 280AI. I have had very good accuracy and they seem to have good terminal performance on the couple of animals I have taken with them.
I was going to try them a little over a year ago, I was told they blow on impact and heard some bad reports on them more then good. I know the regular AccuBond works well and am still up in the air on the ablr bullets.
My nephew has now used the 168gr. ABLRs for 2 hunting seasons and they have performed well for him in both accuracy plus terminal performance and I used 150gr. this year.
I agree that the ABs have been outstanding for me over the years in both accuracy & terminal performance. In fact I am picking up some 140gr. ABs today or tomorrow for my 280AI as I want to be a 2 rifle guy as I am going to start to use 280AI for Antelope and Deer and my 35 Whelen for Elk & Moose.
I feel bad that this year I went Moose hunting and I did not use my 35 Whelen it was a injustice to my favourite calibre !!