# 5.56x45mm MK 255 Mod 0 (RRLP)

A 5.56x45mm NATO MK 255 Mod 0 (RRLP) cartridge with a 4 gram bullet with a copper/polymer composite core with a copper jacket, in a brass case. This cartridge was designed under the name of RRLP (Reduced Ricochet Limited Penetration) in order to substantially reduce collateral damage from ricochets and over-piercing during training and close-quarters operations, as well as providing a significant stopping power effect.

Range | Velocity | Damage | Penetration Power | Drop | Time Of Flight |
---|---|---|---|---|---|

100 m | 836.89 m/s | 59.67 | 17.05 | -0.0 cm | 0.12 s |

200 m | 753.17 m/s | 56.85 | 16.25 | -13.46 cm | 0.25 s |

300 m | 669.22 m/s | 54.03 | 15.44 | -44.46 cm | 0.39 s |

400 m | 585.21 m/s | 51.2 | 14.63 | -97.91 cm | 0.55 s |

500 m | 492.48 m/s | 48.08 | 13.74 | -182.66 cm | 0.74 s |

600 m | 412.8 m/s | 45.4 | 12.97 | -305.34 cm | 0.96 s |

700 m | 363.42 m/s | 43.74 | 12.5 | -487.22 cm | 1.22 s |

800 m | 332.67 m/s | 42.7 | 12.2 | -744.73 cm | 1.51 s |

900 m | 310.46 m/s | 41.95 | 11.99 | -1,087.61 cm | 1.82 s |

1000 m | 292.77 m/s | 41.36 | 11.82 | -1,530.76 cm | 2.14 s |

Zeroed to 100m