Quick view Black Hills 250 Rounds Black Hills Ammunition Factory New D556N9 - 5.56 NATO 77 Grain Hollow Point OTM in 50 round boxes - FREE SHIPPING AND INSURANCE! Factory Fresh 250 rounds of Black Hills Ammunition Factory New D556N9: 5.56mm 77 Grain Open Tip Mat MSRP: Was: Now: $329.60 Add to Cart