You bought a 300 Blackout AR-15... Now what?...

So you bought a 300 AAC Blackout AR-15. Congratulations! But now what?... What ammo do you use? What zero do you hold? What brand of ammo?... This is a user submitted question. Check it out as I try to put you in the right direction.

Need ammo? Sign up for the free newsletter! I send out links to ammo finds to my subscribers every Friday!
Sign up: www.langleyfirearmsacademy.com