Converting 223/556 casings to 300 Blackout.mp4
This video details how I convert 223 or 556 Casings to 300 Blackout. The 300 Blackout casings are very expensive and this gets a few more uses out of the 223 brass. In general, you need to be aware that the 223/556 ammo Will fit in a 300 Blackout Rifle and visa versa. I color code my magazines so-as to not get the rounds mixed up.