I had about 200 223 reloads made. Well no surprise, this fellow did not set his die right, probably on a progressive setup. Now I have 200 223 rounds that some of which will chamber in my bolt gun with a little resistance, some with moderate resistance, and some wont chamber. I did not even know this, when shooting some some through my AR and all went fine through it. Do 5.56 AR chambers have longer headspace?