I wouldn't use Starline for anything unless it was free despite the opinion of so many people online that never push loads.
I don't load, buy, or shoot .223 REM, only 5.56X45 but loaded ammo is hovering around $.42-.45 so I find fifty cents for empty brass merely a stupid purchase.
The last batch of 5.56X45 brass I purchased to prep in bulk was $70 shipped for 1500 pieces. About 1200 of it was usable. That was back before all the silliness. It was one of the many parts of my prep plan I completed before the SHTF.