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Just wanted to share my feedback on the Mossberg 930 JM pro. There are a few websites that stated that this was a good budget option for 3 gun. I picked it up for $650 at Sportsmans Warehouse. This is my first shotgun and I relied on blogs like this to help me be successful.
Based on youtube videos and blogs some of the concerns are:
1) Failure to eject issues
2) Gun shoots high, having to aim 1ft below target
3) Has a cheap follower, requires upgrading
4) Gun has issues in general
So, the 10 days was unnerving with all this going through my head. Was this truth or fake news, time would tell.
Many rumors have some truth behind them so I took steps to insure success.
To minimize the failure to eject issue, I did a couple things. First, I disassembled and cleaned out the grease. Some places had a little and some places had way to much. There is an awesome cleaning video on youtube by JM. JM is saying it doesn't need a lot of lubrication to operate reliably. How can you argue with that! Next, I bought into the break in theory and bought a mix of hot ammo to test it out. Below are the test results.
1st - 10 rounds Hornady Critical Defense 00buck 2-3/4 1600FPS, no issues
2nd - 10 rounds Hornady Black 00buck 2-3/4 1600FPS, no issues
3rd - 15 rounds Winchester Super X 2-3/4 00buck 1325FPS, no issues
4th - 25 rounds Rio Game Load 2-3/4 #6 1-1/4oz 1330FPS, no issues
5th - 25 rounds Aguila Target Load 2-3/4 #7-1/2 1-1/8oz 1250FPS, 2 failures to eject out of 25
6th - 25 rounds Winchester AA Super Sport 2-3/4 #7-1/2 1-1/8oz, 1300FPS, no issues
7th - 25 rounds Winchester Super X 2-3/4 #7-1/2 1oz, 1290FPS, no issues
8th - 25 rounds Remington Gun Club Target Load 2-3/4 #7-1/2 1-1/8oz, 1200FPS, no issues
So, these results were great! Only two failures out of 165 rounds.
Next, to insure the gun would shoot were I was aiming, I installed Tru Glo Magnum Gobble Dot Pro Series sights. To be fair, I never determined if the shooting high rumor was true. But, it doesn't matter, the Tru Glo sight were awesome and they were able to be sighted in perfectly!
Regarding the follower, when I took the gun apart, I did feel like it was a cheap part. It was steel and was a little rough. Perhaps that has gotten hung up for others if your mag tube got dirty. So, I polished it up with a dremel like you would for a cheap trigger. It was a lot smoother after that. The tube was smooth and with a polished follower, seems like that will do the trick. We will see if it ever becomes an issue.
Last issue, gun has issues in general. Well, maybe it does and maybe it doesn't. I think this gun will probably run better on higher powered ammo until it loosens up. But, every gas semi automatic weapon has some balance between reliability and power, thus the reason for adjustable gas blocks and buffer weights in ARs.
Anyways, hope this helps the next guy. I could have bought a Benelli or FNH to boost my confidence. But, I am glad I didn't have too. Now, that is not to say that I won't trade up in the future, but it wouldn't be because the JM pro was a bad gun. It was a lot of fun to shoot and it performed great!
Based on youtube videos and blogs some of the concerns are:
1) Failure to eject issues
2) Gun shoots high, having to aim 1ft below target
3) Has a cheap follower, requires upgrading
4) Gun has issues in general
So, the 10 days was unnerving with all this going through my head. Was this truth or fake news, time would tell.
Many rumors have some truth behind them so I took steps to insure success.
To minimize the failure to eject issue, I did a couple things. First, I disassembled and cleaned out the grease. Some places had a little and some places had way to much. There is an awesome cleaning video on youtube by JM. JM is saying it doesn't need a lot of lubrication to operate reliably. How can you argue with that! Next, I bought into the break in theory and bought a mix of hot ammo to test it out. Below are the test results.
1st - 10 rounds Hornady Critical Defense 00buck 2-3/4 1600FPS, no issues
2nd - 10 rounds Hornady Black 00buck 2-3/4 1600FPS, no issues
3rd - 15 rounds Winchester Super X 2-3/4 00buck 1325FPS, no issues
4th - 25 rounds Rio Game Load 2-3/4 #6 1-1/4oz 1330FPS, no issues
5th - 25 rounds Aguila Target Load 2-3/4 #7-1/2 1-1/8oz 1250FPS, 2 failures to eject out of 25
6th - 25 rounds Winchester AA Super Sport 2-3/4 #7-1/2 1-1/8oz, 1300FPS, no issues
7th - 25 rounds Winchester Super X 2-3/4 #7-1/2 1oz, 1290FPS, no issues
8th - 25 rounds Remington Gun Club Target Load 2-3/4 #7-1/2 1-1/8oz, 1200FPS, no issues
So, these results were great! Only two failures out of 165 rounds.
Next, to insure the gun would shoot were I was aiming, I installed Tru Glo Magnum Gobble Dot Pro Series sights. To be fair, I never determined if the shooting high rumor was true. But, it doesn't matter, the Tru Glo sight were awesome and they were able to be sighted in perfectly!
Regarding the follower, when I took the gun apart, I did feel like it was a cheap part. It was steel and was a little rough. Perhaps that has gotten hung up for others if your mag tube got dirty. So, I polished it up with a dremel like you would for a cheap trigger. It was a lot smoother after that. The tube was smooth and with a polished follower, seems like that will do the trick. We will see if it ever becomes an issue.
Last issue, gun has issues in general. Well, maybe it does and maybe it doesn't. I think this gun will probably run better on higher powered ammo until it loosens up. But, every gas semi automatic weapon has some balance between reliability and power, thus the reason for adjustable gas blocks and buffer weights in ARs.
Anyways, hope this helps the next guy. I could have bought a Benelli or FNH to boost my confidence. But, I am glad I didn't have too. Now, that is not to say that I won't trade up in the future, but it wouldn't be because the JM pro was a bad gun. It was a lot of fun to shoot and it performed great!
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