Caliber: 5.56X45mm – Casing: Factory Brass – Bullet Style: FMJ – Bullet Weight (Grains): 62 – Primer Type: Small Rifle Primer 7.5 – Category: Rifle Ammunition – Suggested Use: Target & Match Range Plinking – Bullet Features: Accurate Positive Functioning No Barrel Leading No Expansion – Quality: Most Magtech products are manufacturered to SAAMI or CIP specifications.