300 blk vs 556

5.56. -The 5.56 is half the cost of 300 BLK and is available in more high-end loading suitable for precision rifle fire. -The 5.56 also shoots flatter, has less recoil, and the ammunition weighs about 40% less. -The 5.56 is also safer for use inside a building for home-defense because the rounds are designed to break apart upon impact. .300 Blk. live score japan vs kroasia