I have been looking all over youtube and have seen meny ways to convert .223 to 300 Blackout. One vid intriged me. It was a progresive press with auto case feeder. One station had a dillon case trimer. I don't recall if the brass was formed first then trimed or vice versa. However it seemed the fastest way to form Blackout brass from .223 and the easyest. Any body try it?