I use to own a small indoor range. Whenever I would see someone shooting factory ammo in one of my personal calibers, and then walk out and leave it I would pick it up and save it. Since my Windham AR is 223 only I recently separated the 556 and 223 brass. It appears that I have numerous brass head-stamped 223 REM that have crimped primers. What gives? I didn't think anybody had made any 223 military in a lot of years. Decades actually. Now I have to go back through and separate my 223 crimped brass from the standard. Just curious if this is a common thing I wasn't aware of.
