223 rounds for my AR. I wish to use Hornady 150gr BTSP bullets, but can’t locate any details to aid that. Knowledge tells me the 550 push prefers a ball kind powder. Any thought exactly where to get started on? Just warning when hunting with .three hundred Blackout subsonic rounds. https://devinqdoaj.blogsvirals.com/37657812/300-blackout-bullets-for-reloading-secrets