Mossberg 590RM Review & Thunder Ranch Burn Down Test

Published on June 14, 2025
Duration: 18:27

This review details a 500-round 'burn down' test of the Mossberg 590RM magazine-fed shotgun at Thunder Ranch, featuring insights from Clint Smith. The test evaluated reliability, ergonomics, and performance with various ammunition types. While the 590RM demonstrated reliability after a break-in period and offered fast shooting capabilities, its higher cost and bulkier magazines were noted as potential drawbacks compared to traditional tube-fed models.

Quick Summary

The Mossberg 590RM is a magazine-fed, pump-action shotgun where 'R' denotes a rotating safety and 'M' signifies its magazine feed. After a 300-round break-in, it showed improved reliability, handling 10 rounds in 4.04 seconds. However, it exhibited ammo sensitivity with Fiocchi Target Max and magazine drop issues.

Chapters

  1. 00:41Introduction to Mossberg 590RM
  2. 01:20Burn Down Test Context
  3. 02:40Clint Smith's Initial Impressions
  4. 05:45Technical Features Overview
  5. 08:01Reliability and Break-in Period
  6. 11:10Speed Shooting Test Results
  7. 11:42Controls and Ergonomics Analysis
  8. 13:40Ammunition Sensitivity Issues
  9. 16:18Magazine Durability and Limitations
  10. 17:30Pricing and Conclusion

Frequently Asked Questions

What is the Mossberg 590RM and what does the designation mean?

The Mossberg 590RM is a magazine-fed, pump-action shotgun. The 'R' in its designation signifies a rotating safety, a feature often found on models developed for government contracts, while the 'M' indicates its magazine-fed system, distinguishing it from traditional tube-fed shotguns.

How reliable is the Mossberg 590RM after a break-in period?

During a 500-round burn down test, the Mossberg 590RM experienced some initial gritty action and follower freeze-ups. However, after approximately 300 rounds, the action smoothed out considerably, demonstrating improved reliability.

What are the key features of the Mossberg 590RM Standoff version?

The Standoff version of the 590RM typically features an 18-inch barrel, an integrated breacher muzzle device, a heat shield, AR-style pistol grip and stock, and an optics-ready receiver. It utilizes a 10-round double-stack magazine.

What ammunition did the Mossberg 590RM have issues with?

The Mossberg 590RM experienced failures to eject specifically when using Fiocchi Target Max ammunition. Notably, other firearms tested concurrently also struggled with this particular ammunition load, suggesting a potential issue with the ammo itself.

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