223 rounds for my AR. I choose to use Hornady 150gr BTSP bullets, but can’t come across any facts to help that. Practical experience tells me the 550 press prefers a ball sort powder. Any strategy where by to begin? Keep on with posted facts only, the only exception is https://reloading-300-blackout-aa52840.blogpixi.com/39112588/the-best-side-of-300-blackout-brass