I have ELD-X in 150gr and 175gr. I'm guessing though slower, I'd getter better groups with the 175 ELD-X
I have RL-23, 25, 26, & H-1000. Looking for Pronghorn/Whitetail load and I believe RL-23 is most temp stable of these.
Not sure if others have tested primers? I have WLRM, GM210M & GM...