223 rounds for my AR. I wish to use Hornady 150gr BTSP bullets, but can’t obtain any info to support that. Practical experience tells me the 550 press prefers a ball form powder. Any idea where to get started on? There are several 300 Blackout hundreds that satisfy the criterion https://andyvyxtl.thekatyblog.com/37281790/5-simple-statements-about-300-blackout-reloading-explained