223 rounds for my AR. I wish to use Hornady 150gr BTSP bullets, but can’t obtain any information to assistance that. Experience tells me the 550 push prefers a ball kind powder. Any plan the place to start out? Of importance, the non-adjustable gas block resides within the pistol place https://300-blackout-brass63062.blogsmine.com/39289348/the-definitive-guide-to-300-blackout-brass