Sorry for the delay in testing but things got crazy since I got married a few weeks ago.
I finally had the time and weather to get out and test the 88gr ELDM with Win 748 and let me just say that the results weren't so good with 748. No discernable node and SD's were in the '20s.
Here is a graph of my Chrono data.
As you can see it is pretty much linear, so only real places to explore further nodes might be around 2500fps and 2600 fps which is far lower than I would like to see with this projectile.
My 75gr ELDM load is much different in its graph.
The nodes at 2750 and 2950 gave me sub .5moa groups.
I still have some of the 88's left so I will try load development with CFE223 and hope to find a node in 2700-2750 range.
Otherwise, the 75gr ELDM will blow the heavier bullets out of the water. They still have a high bc, and I hit a node above 2950fps where I am getting .5MOA or better and, atmospheric depending, will stay super to 1100 to 1200 yards.