The cheapest ones on the shelf
Mil 5.56 brass can be difficult to prime with CCI primers. I use standard primers for all calibers except 7 mm Rem Mag, 300 Win Mag, and 300 WSM that take Fed Large Rifle Magnum #215 primers.
Over the years, Federal, Winchester, Remington, CCI, Tula, and Wold have all given consistent results. I buy the cheapest primers on the shelf every time.
Mil 5.56 brass can be difficult to prime with CCI primers. I use standard primers for all calibers except 7 mm Rem Mag, 300 Win Mag, and 300 WSM that take Fed Large Rifle Magnum #215 primers.
Over the years, Federal, Winchester, Remington, CCI, Tula, and Wold have all given consistent results. I buy the cheapest primers on the shelf every time.