Home Forums Hunting & Shooting AR and Tactical Rifles 223 Ackley in AR?

It doesn't work that way. Changing the shoulder shape and straightening the body does not allow you to run higher pressure. You could've run that same pressure in a standard 223 case as well.

I'm guessing most 223 AI reamers cut a longer throat though, more like 223 Wylde? That accounts for a lot more potential velocity difference than the minimal change in case capacity. Similar to comparing 223 Rem and 5.56 loads.