5.7 Cartridge in a Revolver? | Gun Talk Radio

Published on May 19, 2020
Duration: 3:57

This discussion explores the feasibility and potential drawbacks of chambering the 5.7x28mm cartridge in a revolver, specifically an LCR. While the 5.7x28mm offers higher velocity than .327 Federal Magnum, its high chamber pressures (around 50,000 psi) and the potential for significant unburned powder and large fireballs from short barrels are primary concerns. The conversation also touches on .22 Magnum and .22 Long Rifle as lower-recoil alternatives for sensitive shooters.

Quick Summary

The 5.7x28mm cartridge presents significant challenges for revolver use due to its high chamber pressures (approx. 50,000 psi) and the likelihood of large fireballs and unburned powder exiting short barrels. While its recoil might be manageable, alternative calibers like .22 Magnum or .22 Long Rifle are often preferred for recoil-sensitive shooters in revolvers.

Chapters

  1. 00:09Introduction & Caller Question
  2. 00:385.7x28mm Pressure Analysis
  3. 00:53Fireball & Unburned Powder Concerns
  4. 01:37Alternative Calibers: .22 Magnum
  5. 02:12Velocity Loss in Short Barrels
  6. 02:26Recoil Sensitivity & .22 Rimfire Options
  7. 03:07Hypothetical Revolver Modifications

Frequently Asked Questions

What are the main concerns with putting a 5.7x28mm cartridge in a revolver?

The primary concerns are the high chamber pressures of the 5.7x28mm (around 50,000 psi), which could stress a revolver designed for lower pressures, and the significant fireball and unburned powder likely to exit a short revolver barrel.

How does the 5.7x28mm compare to other revolver calibers in terms of recoil?

The 5.7x28mm, with its lighter bullet, is thought to have a recoil level that falls between a .22 Magnum and a .38 Special, potentially offering a softer shooting experience than the .38 Special for some shooters.

Are there lower-recoil alternatives to the 5.7x28mm for sensitive shooters?

Yes, for individuals very sensitive to recoil, a .22 Long Rifle or .22 Magnum revolver, such as an LCR model, is recommended as a much more manageable option that is still effective.

Why do 5.7x28mm pistols typically have longer barrels?

Longer barrels on 5.7x28mm pistols are designed to maximize the burn time of the propellant, allowing more powder to combust before exiting the barrel. This reduces the amount of unburned powder and the resulting fireball and flash.

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