Sneekeehunter, I feel your pain! Reading thru your prolonged and frustrating attempt to get the ELD-X bullets to shoot well exactly mirrors what I just went thru with 162 gr ELD-X in a 7mm Rem Mag.
Groups at 100 yds were 1.5"-3.5"! I tried everything as you did from accurizing the rifle to different dies, annealing, neck turning, various charges and seating depths to shooting fundamentals. Nothing worked.
A few days ago I decided to try some old Berger 168 gr VLD Hunting reloads just for fun. The 3 shot group was .34"!Wow! The next day I shot .45", .54" and .85" 4 shot groups.
Today, I shot .60", 1.0", .75" and .60 4 shot groups with 3 different charges, cases and dies. At least one of the shots in the 1" group was me.
All I can say is I'm done with trying to get the ELD-X's to shoot in my rifle. I've also read about some marginal terminal performance which is the last thing I want. I originally got away from the Berger's because of the potential for massive meat damage, but on elk, with good shot placement, I'm not as concerned about that.
BTW- I weighed 10 random ELD-X bullets and they all weighed exactly 162.0 grains.
10 Bergers weighed 167.7-168.1 grains.
Good luck hunting!