The Firearm Blog

Video mossberg 930 pro series review

For the aspiring 3-gun shooter, the market used to be pretty sparse for out of the box competition ready guns. Shooters looking for a new scattergun were basically forced to purchase a stock autoloader and then spend nearly the cost of the gun over to again on modifications and kit to extend the magazine, improve ergonomics, ease loading, improve trigger pull, and the list goes on.

However, now there are plenty of options out there from which to choose. One such option is the Mossberg 930 JM Pro Series, based on their popular gas-operated autoloaders.

930 JM Pro

The gun, at its heart, is a 930, and as such is compatible with most accessories meant for 930s, including stocks, forends and barrels. As the pro series, however, it carries quite a few extra go-fast features. First, and most easily noticed, is the extended magazine tube, extended to 8 shots capacity on the 22″ model featured in this article, and 9 shots in the 24″. The extension is Nordic Components, a name synonymous for quality in the shotgun sports. The loading port has been beveled and relieved, and the rear of the forend shortened to make loading easier. It also has a vent-rib barrel with a red fiber optic bead, an adjustable overtravel stop for the trigger, and a big chunky charging handle.

At the range, the gun handles nicely, a bit front-heavy with a full tube but not hard to swing. Recoil from birdshot is comfortable and controllable, slugs are pushy, but not painful, and 3” slugs aren’t even too bad to shoot out of it. The interchangeable chokes are great for making this a jack-of-all-trades gun. This one came with Improved Cylinder, Modified, and Full Chokes, I tend to prefer Modified for 3-gun, as it keeps enough shot on target for those stubborn Texas stars and Polish plate racks, without sacrificing too much pattern spread for hitting up close quickly and sloppily. Reliability was acceptable, once I swore off the cheapest Winchester Universal shells, as they tended to stick in the chamber, to the point of the extractor tearing the rim off when trying to cycle it. When fed Federal bulk it ran like a top. For matches, I stick with Winchester AA heavy target loads.

See also  .300 WSM Winchester Short Magnum vs .308 Winchester Ammo Comparison - Ballistics Info & Chart Caliber Ballistics Comparison 07 Dec, 2018 Posted By: Foundry Outdoors The following ammunition cartridge ballistics information and chart can be used to approximately compare .300 WSM Winchester Short Magnum vs .308 Winchester ammo rounds. Please note, the following information reflects the estimated average ballistics for each caliber and does not pertain to a particular manufacturer, bullet weight, or jacketing type. As such, the following is for comparative information purposes only and should not be used to make precise predictions of the trajectory, performance, or true ballistics of any particular .300 WSM Winchester Short Magnum or .308 Winchester rounds for hunting, target shooting, plinking, or any other usage. The decision for which round is better for a given application should be made with complete information, and this article simply serves as a comparative guide, not the final say. For more detailed ballistics information please refer to the exact round in question or contact the manufacturer for the pertinent information. True .300 WSM Winchester Short Magnum and .308 Winchester ballistics information can vary widely from the displayed information, and it is important to understand that the particular characteristics of a given round can make a substantive difference in its true performance. Caliber Type Velocity (fps) Energy (ft-lb) .300 WSM Winchester Short Magnum Rifle 3080 3580 .308 Winchester Rifle 2680 2620 [Click Here to Shop .300 WSM Winchester Short Magnum Ammo] [Click Here to Shop .308 Winchester Ammo] VelocityAs illustrated in the chart, .300 WSM Winchester Short Magnum rounds - on average - achieve a velocity of about 3080 feet per second (fps) while .308 Winchester rounds travel at a velocity of 2680 fps. To put this into perspective, a Boeing 737 commercial airliner travels at a cruising speed of 600 mph, or 880 fps. That is to say, .300 WSM Winchester Short Magnum bullets travel 3.5 times the speed of a 737 airplane at cruising speed, while .308 Winchester bullets travel 3 times that same speed.Various calibersEnergyFurthermore, the muzzle energy of a .300 WSM Winchester Short Magnum round averages out to 3580 ft-lb, while a .308 Winchester round averages out to about 2620 ft-lb. One way to think about this is as such: a foot-pound is a unit of energy equal to the amount of energy required to raise a weight of one pound a distance of one foot. So a .300 WSM Winchester Short Magnum round exits the barrel with kinetic energy equal to the energy required for linear vertical displacement of 3580 pounds through a one foot distance, while a .308 Winchester round exiting the barrel has energy equal to the amount required to displace 2620 pounds over the same one foot distance. As a rule of thumb, when it comes to hunting, muzzle energy is what many hunters look at when deciding on what caliber of firearm / ammunition to select. Generally speaking, the higher the muzzle energy, the higher the stopping power. Again, the above is for comparative information purposes only, and you should consult the exact ballistics for the particular .300 WSM Winchester Short Magnum or .308 Winchester cartridge you're looking at purchasing. [Buy .300 WSM Winchester Short Magnum Ammo] [Buy .308 Winchester Ammo] Please click the above links to take a look at all of the .300 WSM Winchester Short Magnum and .308 Winchester ammo we have in stock and ready to ship, and let us know any parting thoughts in the comment section below.Foundry Outdoors is your trusted home for buying archery, camping, fishing, hunting, shooting sports, and outdoor gear online.We offer cheap ammo and bulk ammo deals on the most popular ammo calibers. We have a variety of deals on Rifle Ammo, Handgun Ammo, Shotgun Ammo & Rimfire Ammo, as well as ammo for target practice, plinking, hunting, or shooting competitions. Our website lists special deals on 9mm Ammo, 10mm Ammo, 45-70 Ammo, 6.5 Creedmoor ammo, 300 Blackout Ammo, 10mm Ammo, 5.56 Ammo, Underwood Ammo, Buffalo Bore Ammo and more special deals on bulk ammo.We offer a 100% Authenticity Guarantee on all products sold on our website. Please email us if you have questions about any of our product listings. 1 Comments John schade - Jun 02, 2022Good work.essentials are clear and simplified. You may want to bullet characteristics to provide an accurate assessment of a cartridge for a particular game species. Thank you. I’ve ordered a 6.5 creedmore and will be ordering my 1st 1000 rounds from you. JRS Leave a commentComments have to be approved before showing up Your Name * Your Email * Your Comment * Post Comment


I have noted a few drawbacks, the first, and most painful, is the lifter design. The small, semicircular cut in the front of the lifter absolutely loves to catch your thumb off guard and pinch. Badly. There are gunsmiths out there that will weld up this spot to get rid of the cut (and the pinching). This is a common competition mod for other guns as well, including the venerated Benelli M2.

A bigger gripe is the follower, which can bind up between the extension and main magazine tube, as the inner diameter changes (narrowing 0.020”) between the extension and stock tube. The sharp right angles of the stock follower bound up in the tube and caused a serious hangup in a stage, rendering the gun unusable until the follower was knocked loose with a cleaning rod. This frustrated me to the point where I designed a new, low drag follower, and had it carved from stainless steel. Since then I haven’t had a single feed hangup, and it’s easier to verify an empty tube.

Lastly, the gun tends to get dirty fast, and if the piston fouls too much, it will cause failures. I had this happen on a borrowed 930 SPX with the same piston design that had enough fouling that the bolt wouldn’t go into battery fully. If you keep on top of cleaning it, I clean before every match, especially the gas piston, this should be a non-issue.

But, even with these drawbacks, it is still a very good competition ready gun out of the box, with lots of nice bells and whistles, for, and this is truly amazing, fully one third of the price of a comparably equipped Benelli M2 3 gun. The big competitor in the same price bracket is the CZ 712 Practical, which sports a pistol grip and adjustable stock, which I personally don’t care for in a scattergun.

See also  Best Muskie Waters

Bottom Line? I really like this gun. It’s a great 3-gun ready shotgun, that also makes a good jack-of-all-trades (master of none) gun for messing around in the other shotgun sports. I would definitely buy this gun. In fact, I did. The gun featured in this article is now mine, and I still love it.

Specs: Caliber: 12 gauge Barrel length: 22″ or 24″ Capacity (2 3/4″ Shells): 8+1 (22″) or 9+1 (24″) Action: Semi-automatic, gas piston Sights: Vent rib, fiber-optic bead. Choke: Interchangeable

Previous articleBSA Air Rifles USA
Next articleHow to Attract and Keep Bucks on Your Property
Ethan Smith is a seasoned marine veteran, professional blogger, witty and edgy writer, and an avid hunter. He spent a great deal of his childhood years around the Apache-Sitgreaves National Forest in Arizona. Watching active hunters practise their craft initiated him into the world of hunting and rubrics of outdoor life. He also honed his writing skills by sharing his outdoor experiences with fellow schoolmates through their high school’s magazine. Further along the way, the US Marine Corps got wind of his excellent combination of skills and sought to put them into good use by employing him as a combat correspondent. He now shares his income from this prestigious job with his wife and one kid. Read more >>