I have stumbled upon XBR 8208 as being a possible great powder in a .223AI. I have a good load developed using RL-15 but I'm thinking I can get a bit better velocity with 8208.

Who here is using 8208 with a 75 gr AMAX in a .223AI and what is your:

load/length/primer
barrel length
twist

I tried some in my 223 rem pushing 55 gr Vmax's and was not impressed ,win brass,ccibr4 primers, will try some behind the 75 gr Amax next, I've heard others say they like it, but so far I have not found the right combo!