New S&W M&P 22 Magnum Ammo & Reliability Testing

Published on August 12, 2023
Duration: 23:26

The S&W M&P 22 Magnum requires a break-in period and is highly sensitive to ammunition type and shooter grip. Initial reliability issues were linked to brass shavings and a need for a firm grip to overcome the light slide mass. Hornady 30gr V-MAX proved most reliable, while other ammo types and improper grip led to malfunctions.

Quick Summary

The S&W M&P 22 Magnum requires a firm grip to cycle reliably due to its light slide mass and gas-operated system, preventing 'limp-wristing.' Hornady 30gr V-MAX ammo is recommended for its higher pressure, ensuring better cycling performance compared to other .22 WMR rounds.

Chapters

  1. 00:00Intro: M&P 22 Magnum Reliability Issues
  2. 01:18Addressing Optic Weight & Ammo Variables
  3. 02:46Mechanical Inspection & Caliber Comparison
  4. 05:47Range Test: CCI Maxi-Mag Ammo
  5. 10:25Grip Sensitivity & Limp-Wristing
  6. 14:42Best Ammo: Hornady 30gr V-MAX
  7. 17:10Final Conclusions & Recommendations

Frequently Asked Questions

What causes reliability issues with the Smith & Wesson M&P 22 Magnum?

Reliability issues can stem from the firearm's sensitivity to ammunition type, the need for a break-in period, and shooter grip. The light slide mass requires a firm grip to prevent 'limp-wristing,' and some .22 WMR rounds lack the pressure needed to cycle the action reliably.

What is the best ammunition for the S&W M&P 22 Magnum?

The Hornady 30gr V-MAX .22 WMR ammunition is recommended as the most reliable choice. It provides more cycling authority due to higher pressure, helping to overcome the firearm's inherent friction and gas system sensitivities.

Does the S&W M&P 22 Magnum require a break-in period?

Yes, the video suggests a break-in period of around 300 rounds is necessary for the S&W M&P 22 Magnum to achieve improved reliability. Initial testing showed significant issues that were reduced after this break-in.

Why is grip important for the M&P 22 Magnum?

The M&P 22 Magnum has a very light slide and uses a gas-operated system. It requires a firm, torqued grip to absorb recoil and allow the slide to cycle properly, preventing malfunctions often caused by 'limp-wristing'.

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