I've begun reloading for my DCM model. I'm not new to reloading but I am new to .223 I've come across a situation that I find curious. I've measured the distance to the lands of my rifle using a Stoney Point tool and a 52 grain Matchking bullet. The distance to the lands when measured with a Stoney point comparator is 2.910 inches. This is less than the maximum length across the 20 round Colt magazines I'm using. Is this normal? OR Have I missed something unique to the AR?