I'm running the 225gr ELD-M with H1000, WLR, and Norma brass. 3.616" coal is a .010" jam into the rifling. 26" factory Remington barrel. I used Hodgdon h1000 data w/ the 230gr Berger to start, max is listed as 76gr.
my first ladder test from 69-76gr was nothing particularly spectacular. Some decent groups on the low end but the velocity wasn't there for me.
2nd ladder test was 75-79gr. 79gr was 2888fps with flatter primers, very light ejector marks, and a little stickier bolt lift. I wouldn't go any higher than this.
I found a good grouping with 76.6, 77, and 77.6gr. 2814, 2820, 2826fps respectively.
i think I'll settle on 77gr and play with seating depth. I've heard hornady recommends .020-.030" of jump, so we'll see.
ETA: Stuck with 77gr of h1000. Played with seating depth today, .010 jam was about .7" at 100 yards, at the lands was about an inch, .010 jump was 1-1/4", and .020 jump was a frisky .483" I think I found my load. ES/SD to come.
the 225 eld-m really seems to like the .020-.030 jump