223 rounds for my AR. I choose to use Hornady 150gr BTSP bullets, but can’t uncover any information to support that. Working experience tells me the 550 press prefers a ball style powder. Any notion wherever to start? Just warning when looking with .three hundred Blackout subsonic rounds. These hundreds https://brass-300-blackout63848.vblogetin.com/43694460/the-definitive-guide-to-300-blackout-brass