223 rounds for my AR. I choose to use Hornady 150gr BTSP bullets, but can’t locate any info to assist that. Knowledge tells me the 550 push prefers a ball sort powder. Any thought where to start? Felt recoil will vary from shooter to shooter and rifle to rifle, but https://300-aac-reloading10740.idblogz.com/38901058/5-easy-facts-about-brass-300-blackout-described