The Amax and ELD are very close. I think my seating depth was changed like .013-.014" or so when I made the switch. The ELD had to be run that much longer to have the same jump to the lands as the Amax. To be honest, I didn't shoot the 75 Amax for very long, but that is what I recall.
Your primer crating is the same that I have observed with CCI400 primers. One of my bolts is quite bad and will get the fix. The other is noticeable but I'm going to live with the crating.
I shoot the same load as Dude in my standard 223. 26.0 lever which gets me 2970 fps in a new 26" tube. I expect my speed may increase as I get more rounds down range.
Good luck!
