M855 vs. M193: Which 5.56 Round Is The Best?

Published on October 29, 2021
Duration: 15:10

This comprehensive review from Mrgunsngear, an established subject matter expert, details the performance differences between M193 and M855 5.56x45mm NATO ammunition. The analysis includes velocity testing, terminal ballistics in gel, and comparative pros and cons, offering valuable insights for AR-15 and M16 owners.

Quick Summary

Mrgunsngear compares M855 vs M193 5.56 rounds, noting M193 (55gr FMJ) averages 3055 FPS from a 16" barrel, while M855 (62gr Green Tip) averages 2997 FPS. M855 offers better barrier penetration and long-range accuracy, whereas M193 is often cheaper and more accurate at closer ranges.

Chapters

  1. 00:00Introduction and History
  2. 01:47Velocity Testing
  3. 03:16Ballistic Gel Testing
  4. 07:25Comparative Analysis
  5. 11:16Conclusion and Final Thoughts

Frequently Asked Questions

What are the key differences between M193 and M855 5.56 ammunition?

M193 is a 55-grain FMJ round, typically faster and less expensive, favored for close-range accuracy. M855 is a 62-grain 'Green Tip' round with a steel penetrator, offering better barrier penetration and long-range accuracy but requiring faster barrel twists.

How does M855 perform in ballistic gel compared to M193?

In ballistic gel tests, M855 demonstrated deeper penetration, reaching up to 22 inches from a short barrel, though its fragmentation was delayed. M193 showed more violent reactions but sometimes inconsistent expansion.

What velocity differences were observed between M193 and M855?

From a 16-inch barrel, M193 averaged 3,055 FPS, while M855 averaged 2,997 FPS. From an 11.5-inch barrel, M193 achieved 2,847 FPS and M855 reached 2,745 FPS.

Why is barrel twist rate important when choosing between M193 and M855?

M855 projectiles are longer and heavier than M193, requiring a faster barrel twist rate (like 1:7 or 1:8 inches) to stabilize them properly for accurate flight. M193 generally performs well with standard twists.

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