will use this ammo for now on the price of ammo at bulk ammo is awsome sue this ammo in my stag 2 and effectiveness was awsome at 100yd, it dose enable if you use a piston kit like adams a lot less to scrub not this ammo is dirty my AR was extremely thoroughly clean soon after taking pictures 100rds. (Posted on 7/27/2013) Performs as envisioned Eva