Firearms Facts Episode 8: "The 7.62 Confusion"

Published on August 23, 2012
Duration: 6:17

This guide clarifies the common confusion surrounding various 7.62mm cartridges. It explains the metric designation system, differentiating between rounds like 7.62x54R, 7.62x39, 7.62x51 NATO, and 7.62x25 Tokarev. The video emphasizes that these cartridges are not interchangeable and highlights other .30 caliber rounds that fall within the 7.62mm diameter range. Proper identification is crucial for safe firearm operation.

Quick Summary

The term '7.62' is often used generically but refers to distinct, non-interchangeable cartridges like 7.62x54R, 7.62x39, 7.62x51 NATO, and 7.62x25 Tokarev. Metric designations indicate projectile diameter and case length in millimeters. Understanding these differences is crucial for safe firearm operation, as using the wrong ammunition can cause severe damage and injury.

Chapters

  1. 00:11Introduction to 7.62 Confusion
  2. 00:51Metric Designation Explained
  3. 01:437.62x39 and 9x18 Makarov
  4. 02:087.62x51 and .308 Winchester
  5. 02:32Specialized 7.62 Rounds
  6. 03:11Other .30 Caliber Variants

Frequently Asked Questions

What is the main confusion surrounding 7.62mm cartridges?

The main confusion stems from the generic use of '7.62,' which refers to many distinct cartridges that are not interchangeable. These include 7.62x54R, 7.62x39, 7.62x51 NATO, and 7.62x25 Tokarev, each with different case lengths and intended firearm types.

How do metric cartridge designations work?

Metric designations, like 7.62x39, use the first number for the projectile diameter in millimeters (7.62mm) and the second number for the case length in millimeters (39mm). The 'R' in 7.62x54R indicates a rimmed cartridge.

Are 7.62x51 NATO and .308 Winchester the same?

While often used interchangeably in civilian contexts, 7.62x51 NATO and .308 Winchester can have slight differences in pressure and specifications. For most common firearms and shooting applications, they are functionally equivalent.

What are some common firearms chambered in different 7.62mm rounds?

The 7.62x54R is famously used in the Mosin Nagant rifle. The 7.62x39mm is standard for AK-47 pattern rifles. The 7.62x51mm NATO is common in many Western military and hunting rifles (often labeled .308 Winchester). The 7.62x25 Tokarev is a pistol round for firearms like the TT-33.

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