Sten Gun in .455? (Q&A: British Small Arms of World War Two)

Published on January 24, 2025
Duration: 0:56

This Q&A segment from Forgotten Weapons debunks the idea of a .455 Auto Sten Gun, highlighting the cartridge's unsuitability for reliable submachine gun feeding. Ian McCollum explains that by WWII, British pistols used .38-200, also ill-suited for SMGs, and that experimental .455 SMGs like the Owen Gun were unsuccessful, favoring 9mm Parabellum.

Quick Summary

The .455 Auto cartridge was unsuitable for submachine gun development due to its geometry, which hindered reliable feeding in large-capacity box magazines. By WWII, British sidearms used .38-200, also not ideal for SMGs, and experimental .455 SMGs like the Owen Gun failed.

Chapters

  1. 00:00Hypothetical .455 SMG Development
  2. 00:08Technical Flaws of .455 Auto for SMGs
  3. 00:20WWII British Pistol Calibers
  4. 00:40The Owen Gun and 9mm Superiority

Frequently Asked Questions

Why wasn't the Sten Gun developed in .455 Auto?

The .455 Auto cartridge's geometry made it unreliable for feeding in the large-capacity box magazines needed for a submachine gun. By WWII, Britain had moved to .38-200 for pistols, which was also unsuitable for SMGs.

What were the main issues with using .455 Auto in a submachine gun?

The primary issue was feeding reliability. The shape of the .455 Auto cartridge is not conducive to smooth and consistent feeding from a high-capacity box magazine, a critical requirement for submachine guns.

What caliber were British sidearms during WWII?

During World War II, British military sidearms like Webley and Enfield revolvers were primarily chambered in .38-200. This was a departure from earlier calibers like .455.

Did any British submachine guns use .455 Auto?

An experimental Owen Gun was tried in .455 Auto, but it was unsuccessful. The platform proved much more effective and reliable when chambered in the standard 9mm Parabellum.

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