Hey everyone. New to the forum. I'm sure the question has been asked several times, but havent seen an answer. I'm getting a Aero Precision M4E1 complete upper on Monday. It's a ballistic advantage barrel with a 1/7 twist. I want to actually test the accuracy with my 4-12x40mm Nikon, before I put a X3 Burris on it. Any suggestions on what kind of ammo this barrel likes for accuracy? Also, what is a fairly accuracte plinking ammo? Thanks everyone!