Introduction

The Mossberg 940 JM Pro is a shotgun that enthusiasts rave about for its performance and reliability. Designed with the competitive shooter in mind, it boasts impressive features and versatility. However, like any firearm, it’s not immune to occasional hiccups. Whether you’re hitting the range or preparing for competition, encountering issues can be frustrating.

From light primer strikes to recoil discomfort, understanding these common problems can make all the difference in your shooting experience. With quick solutions at hand, you’ll be back on target before you know it. Let’s dive into the 5 main Mossberg 940 JM PRO problems and explore effective fixes that keep your shooting sessions smooth and enjoyable!

Common Problems with the Mossberg 940 JM PRO

The Mossberg 940 JM Pro is a popular choice among competition shooters and hunters alike. However, like any firearm, it can encounter Mossberg 940 JM PRO problems that may affect performance.

1: Light Primer Strikes & Its Solution

Light primer strikes are a common issue with the Mossberg 940 JM PRO. This problem can lead to misfires, causing frustration during critical moments. One primary cause is the firing pin’s insufficient energy transfer. The spring tension may not be strong enough, resulting in weak strikes on the primer.

To solve this, first inspect your firing pin and spring for wear or damage. If they appear worn out, replacing them can significantly improve performance. Another fix involves ensuring proper ammunition selection. Sometimes using lower-quality or incompatible shells can contribute to light strikes.

Regular maintenance is crucial too; clean any debris from the action that might hinder movement. Keeping everything well-lubricated ensures smooth functionality and reliable ignition every time you pull the trigger.

2: Extractor Malfunctions & Its Solution

Extractor malfunctions can be a frustrating issue when operating the Mossberg 940 JM PRO. This problem typically arises when the extractor fails to grasp or remove spent casings reliably, leading to jams and interruptions during shooting.

To address this, first inspect your extractor for wear or damage. A worn extractor may not hold onto the shell properly, causing extraction failures. If you notice any issues, replacing it with a new one is often the best solution.

Another potential fix involves cleaning. Dirt and debris can accumulate around the extractor area over time, affecting its functionality. Regular maintenance ensures smooth operation and enhances performance.

Consider using high-quality ammunition that matches your shotgun’s specifications. Sometimes poor-quality shells contribute to these problems as well. By choosing reliable ammo and maintaining proper care of your firearm, you can significantly reduce chances of malfunctioning extractors in future sessions.

3: Failure to Feed or Eject & Its Solution

Failure to feed or eject is a frustrating issue that can affect the performance of your Mossberg 940 JM PRO. This problem often arises from either magazine-related issues or improper maintenance.

First, check the magazine for debris or damage. A dirty magazine can hinder proper feeding. Cleaning it regularly will help ensure smooth operation. Next, inspect your ammunition. Mismatched brass sizes or poor-quality rounds may cause feeding problems as well. Stick with reputable brands and verify compatibility with your shotgun.

Examine the extractor mechanism. Sometimes, a worn-out extractor fails to grip shells properly during cycling events. If you notice wear, consider replacing this part for optimal function.

4: Trigger Malfunctions & Its Solution

Trigger malfunctions can be frustrating. They may lead to misfires or failure to reset, disrupting your shooting experience. One common cause is dirt or debris obstructing the trigger assembly. Regular cleaning and maintenance are essential here. A simple disassembly and thorough wiping of components often solve this issue.

Another possibility is a weak hammer spring. If you notice an inconsistent firing pin strike, consider replacing this component for reliable performance. Additionally, check for proper lubrication on moving parts. Too much oil can attract grime, while too little can lead to stiffness in the mechanism.

Ensure that you’ve correctly installed any aftermarket triggers if applicable. Over-tightening screws may also hinder function; always follow manufacturer recommendations for adjustments.

5: Recoil and Kickback & Its Solution

Recoil and kickback can be a concern for Mossberg 940 JM PRO users, especially during extended shooting sessions. This shotgun packs quite a punch, which may lead to discomfort or flinching over time.

To mitigate this issue, consider using a quality recoil pad. An upgraded pad can absorb shock effectively and enhance overall comfort when firing. Another option is adjusting your stance. A stable base allows you to manage recoil more efficiently. Leaning slightly into the shot can help distribute forces evenly across your body.

Experimenting with different loads can also make a difference. Lighter loads result in reduced recoil while still providing adequate performance for most applications. Regular maintenance of your firearm ensures that everything functions smoothly, reducing unexpected jolts during operation.

FAQs – Mossberg 940 JM PRO Problems

Q: What is the ideal ammunition for the Mossberg 940 JM PRO?
Using high-quality, reliable shells helps ensure optimal performance. Many users find that lighter loads work best to reduce recoil.

Q: How often should I clean my Mossberg 940 JM PRO?
Regular maintenance is crucial. Clean your shotgun after every few uses or when it starts showing signs of wear.

Q: Can I install aftermarket parts on my Mossberg 940 JM PRO?
Yes, aftermarket upgrades are available. Just ensure they’re compatible with your model to avoid any functionality issues.

Q: Is there a warranty on the Mossberg 940 JM PRO?
Mossberg typically offers a limited warranty covering defects in materials and workmanship. Always check their policy for specific details.

Q: What’s the effective range of this shotgun?
The effective range largely depends on shell type and usage, but many find it performs exceptionally well within a distance of around 40 yards.

Conclusion

Owning a Mossberg 940 JM PRO can be an exciting experience, especially for shotgun enthusiasts. However, like any firearm, it’s essential to understand the common issues that may arise and how to resolve them efficiently.

By being aware of potential problems such as light primer strikes or extractor malfunctions, you can take proactive measures to maintain your shotgun’s performance. Addressing failure-to-feed or eject scenarios ensures smooth operation during shooting sessions. Understanding trigger malfunctions and managing recoil are equally vital for enhancing your overall shooting experience.

Staying informed about these issues not only helps in troubleshooting but also fosters a deeper connection with your firearm. Regular maintenance checks and immediate attention to any symptoms will go a long way in preserving the integrity of your Mossberg 940 JM PRO.

Whether you’re a seasoned shooter or new to firearms, having this knowledge at hand empowers you on the range and beyond. After all, ensuring your weapon functions reliably enhances both safety and enjoyment while using it.