223 rounds for my AR. I choose to use Hornady 150gr BTSP bullets, but can’t locate any facts to guidance that. Working experience tells me the 550 push prefers a ball style powder. Any idea where to get started on? Just caution when hunting with .three hundred Blackout subsonic rounds. https://300-blackout-brass64073.madmouseblog.com/17722272/300-blackout-bullets-for-reloading-secrets