Lake City does make 223 REM stamped ammo. I just reloaded 150 pieces of them. I think they came in factory boxes of the brand Herters. I would post a picture, but it’s a pain for me as I’m ignorant about adjusting the size. Just for this website, others don’t make a big deal about the size or they have some tool that adjusts it automatically to their liking and I post all the time.
