Mossberg 940 JM Pro Review - Factory Ready 3Gun Shotgun?

Published on March 26, 2021
Duration: 10:57

This guide covers essential setup and handling for the Mossberg 940 JM Pro, focusing on its suitability for 3-Gun competition. It details length of pull adjustment, understanding the unique autoloader action, improving the loading port, utilizing competition accessories like shell caddies and choke tubes, and selecting appropriate sights for different scenarios. The information is presented with an expert tone, drawing from practical experience with the platform.

Quick Summary

The Mossberg 940 JM Pro is a significant upgrade for 3-Gun competition, offering improved reliability, enlarged controls, and better handling compared to the older 930 JM. It features a 24-inch barrel, adjustable LOP, and comes with Briley chokes and fiber optic sights, making it a strong 'out of the box' option.

Chapters

  1. 00:35Introduction to Shotguns
  2. 00:56Mossberg's Return to 3-Gun
  3. 01:37Profile & Handling Overview
  4. 02:01Physical Specifications
  5. 02:29Handling and Maneuverability
  6. 02:40Recoil System Improvements
  7. 03:09Reliability and Malfunctions
  8. 03:53Controls and Loading Overview
  9. 04:24Enlarged Controls
  10. 04:34Mossberg Autoloader Action
  11. 05:03Loading Port Improvements
  12. 05:25Safariland Shell Caddies
  13. 06:50Sights and Barrel Choice
  14. 07:15Fiber Optic Sights
  15. 07:34Missing Mid-Bead
  16. 07:56Slug Shooting Accuracy
  17. 08:18Trigger Performance
  18. 08:44Trigger Assembly Fit
  19. 08:57Choke Tubes
  20. 09:47Final Verdict: 940 JM Pro

Frequently Asked Questions

What are the key improvements of the Mossberg 940 JM Pro over the older 930 JM model for 3-Gun competition?

The 940 JM Pro features an improved gas system for better reliability with various loads, enlarged controls for easier manipulation under pressure, and a refined loading port. It addresses common 930 issues and is designed with competitive shooters' needs in mind.

How does the Mossberg 940 JM Pro handle during dynamic shooting and maneuverability tests?

Despite its 24-inch barrel, the 940 JM Pro is maneuverable, weighing under 8 lbs unloaded. Its length and weight do not hinder transitions, and it can be comfortably shouldered for navigating obstacles during competition stages.

What are the recommended sights and choke tubes for the Mossberg 940 JM Pro in 3-Gun?

The shotgun comes with high-viz fiber optic sights, suitable for speed. For long-range accuracy, a triangle pipe sight is recommended. It includes tool-less Briley chokes (Cylinder, Improved Cylinder, Modified), with Cylinder being ideal for slugs.

What is the reliability and trigger performance of the Mossberg 940 JM Pro?

The manufacturer claims 1500 rounds between cleanings. In testing, it fired 300 rounds with only two malfunctions. The trigger breaks around 4.5 lbs with a distinct wall, but has a long reset that requires careful management.

More Range & Competition Videos You Might Like

More from SuperSetCA

View all →