Home Forums Hunting & Shooting Hunting Rifles What does 223AI mean?

I think at normal hunting ranges they are completely unnecessary �.hence there are no mag mods on this gun, no throat for heavies, and the plan is to use 55gr TTSXs�.and maybe 62s down the road.
The ONLY reason I stepped up in weight from the 50s Ive been using was that they had so little surface area and pressure, the velocity was no better than a regular .223�otherwise the 50s went through, and killed, everything I ever pointed them at.