This Sniper Rifle Can Fire the Wrong Ammo!!!

Published on October 10, 2024
Duration: 1:00

This guide details an experiment from DemolitionRanch where a PSA Sabre 10 rifle chambered in .308 Winchester is tested with 7.62x39mm ammunition. The video, presented by Matt Carriker, demonstrates that while the rifle can fire the incorrect caliber, the casing undergoes significant fire-forming due to the chamber size difference, and the action does not cycle. It highlights the importance of using correct ammunition for safe and reliable firearm operation.

Quick Summary

Firing 7.62x39mm ammunition in a .308 Winchester rifle like the PSA Sabre 10 results in the casing undergoing significant fire-forming to fill the larger chamber. While the rifle may fire the round, the action will not cycle due to the case's deformation and improper extraction, highlighting critical ammunition incompatibility and safety concerns.

Chapters

  1. 00:00Intro: PSA Sabre 10 & .308 Test
  2. 00:12The Experiment: .308 vs 7.62x39
  3. 00:34Firing the 7.62x39 Round
  4. 00:45Casing Analysis: Fire-Forming

Frequently Asked Questions

Can a .308 rifle fire 7.62x39mm ammunition?

While a .308 Winchester rifle like the PSA Sabre 10 might physically fire a 7.62x39mm round, it is not recommended or safe. The experiment showed the 7.62x39mm casing fire-formed significantly to fill the larger .308 chamber, and the rifle's action did not cycle, indicating a malfunction and incompatibility.

What happens when you fire 7.62x39mm in a .308 rifle?

When 7.62x39mm is fired in a .308 Winchester rifle, the brass casing undergoes 'fire-forming,' expanding dramatically to match the larger chamber dimensions. This results in a deformed casing and a failure of the firearm's action to cycle, preventing proper extraction and feeding of subsequent rounds.

Is it safe to shoot different calibers in a rifle?

No, it is generally not safe to shoot ammunition of a different caliber than what the rifle is designed for. Even if the bullet diameter is similar, case dimensions, pressure curves, and chamber tolerances differ significantly, potentially leading to firearm damage, malfunctions, or dangerous pressure build-up.

What is fire-forming in firearms?

Fire-forming is the process where an unfired cartridge case expands and reshapes itself to perfectly fit the firearm's chamber upon firing. This is often done intentionally for wildcat cartridges but can occur unintentionally and unsafely when incorrect ammunition is chambered, as seen when firing 7.62x39mm in a .308 rifle.

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