5.56 Vs. 5.45 Ballistics Gel Test

Published on March 5, 2021
Duration: 10:34

This video provides an expert-level comparison of the 5.56x45mm and 5.45x39mm calibers through a detailed ballistics gel test. The analysis, conducted with high authority, focuses on terminal ballistics, including yaw, tumble, and penetration depth. It highlights the effectiveness of both rounds, noting subtle differences in their performance characteristics and the fun factor associated with the 5.45x39mm.

Quick Summary

A ballistics gel test comparing 5.56x45mm and 5.45x39mm rounds revealed distinct terminal performance. The 5.56x45mm (55gr FMJ) yawed and tumbled earlier (2.5 inches) causing immediate damage, while the 5.45x39mm (59gr FMJ) maintained stability longer (yawing at 4-4.5 inches) and achieved deeper penetration (15 inches).

Chapters

  1. 00:00Introduction: 5.56 vs 5.45 Caliber Comparison
  2. 00:42Caliber History: Development of Intermediate Rounds
  3. 02:085.45x39mm Gel Test: AK-74 Performance
  4. 02:475.56x45mm Gel Test: AR-15 Performance
  5. 03:16Gel Analysis: Damage and Yaw Comparison
  6. 08:00Penetration Results: 5.56 vs 5.45
  7. 08:56Conclusion: Overall Effectiveness and Recoil

Frequently Asked Questions

How does the 5.56x45mm compare to the 5.45x39mm in ballistics gel?

In a ballistics gel test, the 5.56x45mm (55gr FMJ) began yawing and tumbling earlier (around 2.5 inches) causing significant initial damage. The 5.45x39mm (59gr FMJ) maintained a straighter path longer, yawing around 4-4.5 inches, and achieved deeper penetration.

What are the key differences in terminal ballistics between 5.56 and 5.45 rounds?

The primary difference observed was the timing of yaw and tumble. The 5.56x45mm tends to yaw and tumble sooner, creating immediate tissue disruption. The 5.45x39mm holds its stability longer, leading to deeper penetration before significant yawing occurs, though both are highly effective.

Which caliber, 5.56x45mm or 5.45x39mm, penetrates deeper?

The 5.45x39mm round tested achieved a penetration of 15 inches in the Clear Ballistics gel. The 5.56x45mm penetrated 12 inches before exiting the side, with an estimated potential of 14-15 inches if it had remained centered.

What factors influenced the development of the 5.56x45mm and 5.45x39mm calibers?

Both calibers emerged from a trend to replace heavier 30-caliber rounds with lighter, high-velocity ammunition. This shift aimed to increase rifle capacity, improve shooter maneuverability, and enhance controllability during rapid fire.

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