The short version is I decided to try reloading .223REM As all know, components are difficult to get, and I'm still looking for small rifle magnum primers. Through a quirk, I ended up with two sets of RCBS .223REM small base dies. One in a black box and the other in a green box. The green is labeled Group A part number11103 and the black box set is labeled group AR and part number 11107. My questions are what is the difference? Which is better (if there is one) to keep? I am running a single stage and a turret press. I tried the RCBS website but info on the differences seemed sparse or I missed it. Advice from knowlegable and experienced folks like deadshot welcome.