The AI AICS magazines I have will hold about 2.550", and from my search, the other AICS-compatible magazines I can find range from 2.325" to 2.550" max length. Are there any .223 magazines that fit into an AICS-compatible chassis that are longer? I'm trying to load 85.5gr Bergers, and putting them at max mag length (2.550") put the bearing surface right at or a bit below the neck shoulder junction, which I usually try to avoid. I'd like to be at 2.600".