The Amax data shows up to 45. That's why I started with 43.8 with the ELD-X. Happy spot for Rem R25 was at 44.6 with Amax. Was hard to find data for ELD for a while. Working up load for buddys Les Baer custom with essentially same specs at The R25. Loaded 43.8 to 44.6 by .2. First 43.8 blew primer. Thought OK bad something on my part. Sent second round and no blown primer but pressure signs out the wazoo. Went back and deconstructed all had built. Went to 42.4 and built another test group. Pressure at 42.4. Took all those apart. By then Hornady had published some ELD data that says 42.4 max (varget) on ELd-x 178. Went to 41.4 and built again. Found sweet spot at 41.6.
Keeping in mind this was with AR's and supressed. Out of the Les baer (and lead sled) was getting .255 groups at 100 yards. Did not test out past 100 as I was only the get it rolling huckleberry.