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 Post subject: Drum won’t run
PostPosted: Fri Oct 19, 2018 5:00 pm 
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Joined: Thu Oct 11, 2018 3:53 pm
Posts: 1
I picked up a new VEPR-12 about a month ago.
It ran ok out of the box on heavy loads.
I’ve done a lot of my own gun smithing and now have it running 3 dram ammo just fine out of 12 round SGM mags (mags aren’t tuned)
I bought a 25 round drum from Dissident Arms and paid extra for them to tune it.
The drum does not run properly at all. Last night I had 4 FTE’s in one drum. It’s stovepipimg- empty shell is 90 degrees from barrel.
Drum mags are new to me.... is the follower supposed to pop out if you wiggle it around? Is the shell presentation supposed to be different? Sometimes I put the drum in and the front of the shell is 1/16” from the chamber, other times it’s 3/16” away and the bolt doesn’t move properly.
Gun is throwing the shells about 6 feet between 1-2 o’clock. My optic is mounted out of the way.

I called dissident arms and they told me the drum is tuned and will work.
They offered to tune my gun for $400 which will probably be $500 with shipping.
I’m not interested in that since this is an isolated magazine issue.

This gun is becoming a pain in the butt and a money pit.


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 Post subject: Re: Drum won’t run
PostPosted: Sun Oct 21, 2018 4:43 am 
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Joined: Tue Sep 25, 2012 10:43 pm
Posts: 3038
Location: Yulee, Florida
If the drum is feeding and the gun is not outrunning it they have done a good job tuning it. It is simply a feeding device. You may just need to fire stronger loads with the drum. Try some Winchester AA 1250 fps or 1300 fps and see how it goes. The Winchester AA loads are still pretty cheap and they are offering bulk packs of the Win AA 1250 fps now for about $30 per 100. If it stovepipes, it is close to ejecting. Win AA 1250 fps may run in it with the drum.


Having said that I'm not a fan of the SGM drum. MD-20 drums for the Saiga-12 never needed tuning, they just worked right out of the box, and for thousands of rounds in my case.

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 Post subject: Re: Drum won’t run
PostPosted: Fri Nov 30, 2018 11:30 pm 
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Joined: Mon Jul 01, 2013 9:06 pm
Posts: 1828
Location: Washington
Your malf description does sound like you just need a bit hotter ammo, or a gun tuned to cycle much weaker ammo.

You can call it a money pit, but buying ammo with enough energy to cycle the action doesn't actually cost more, it just costs attention.

Get something that works out to 3.25 dram equivalent or higher and my bet is your gun will run just fine with that.

If your drum were the issue, you would be seeing different problems.

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 Post subject: Re: Drum won’t run
PostPosted: Mon Dec 03, 2018 1:46 pm 
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Joined: Wed Apr 30, 2014 10:49 pm
Posts: 115
You said it ran ok out of the box with heavy shells. I don't see where you say what you were using when you have the issue. Did you try the "heavy shells" again and now they don't work? BTW, I looked up what SGM says: https://www.sgmtactical.com/wp-content/uploads/2016/07/Drum-Instructions-Final.pdf


Quote:
SGM Tactical Vepr 25 Round Drum

From The Manufacturer
Use Only 2-3/4" Shells Over 1300 fps
1. Load the drum one shell at a time. Ensure each shell is well seated in the feed lips.
2. Press down and hold the shell in place while you load the next Shell.
3. Once your drum is loaded, lock your bolt to the rear and engage the safety.
4. Insert the drum into the magazine well and ensure you have a good lock. (The drum will break in and become much easier to load. 4-5 uses should do it , flipping the shotgun upside down the first few times will make this easier)
5. Point the shotgun down range and release the bolt. (Ensure you have a good feed on the first round in the chamber)
6. Youre ready to fire. (Range Safety Rules Always Apply!)
7. DO NOT CONDUCT COMBAT RELOADS AND DROP THE DRUM.

There is a troubleshooting page. #1 is : ALWAYS CLEAN YOUR SHOTGUN Shotgun Shells Are Very Dirty And They Will Start
To Foul Your Gas System At 75- 100 Shells.


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 Post subject: Re: Drum won’t run
PostPosted: Sat Dec 08, 2018 4:06 pm 
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Joined: Sat Oct 26, 2013 7:13 am
Posts: 1760
Location: Great State of Pennsylvania
Excellent post High Brass!

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 Post subject: Re: Drum won’t run
PostPosted: Sat Dec 08, 2018 5:22 pm 
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Joined: Tue Sep 25, 2012 10:43 pm
Posts: 3038
Location: Yulee, Florida
To be noted, some 3 dram loads are labeled 'heavy'. The word 'heavy' on a box should not be used as an indicator of power, high dram eq, etc.

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