Snap Cap Findings

Discussion in 'Mossberg MVP Rifle General Discussion' started by Keith, Feb 21, 2016.

  1. Keith Moderator

    Member Since:
    Dec 7, 2014
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    While doing the magazine swap today on the 5.56 Patrol, I ran into an interesting issue that others may run across later on.

    It seems the snap caps are not always to spec and will not properly extract and eject. Since I had not had a chance to fire this rifle yet, I thought I might have a problem so started looking. After looking at how the new mag went in compared to the original and looking at the extractor for fit and function, I decided to try some actual live rounds (which I don't like to do when just doing a function check) and they cycled just fine. The snap cap/proving rounds I was using was a Magpul proving round and A-Zoom snap caps.

    This is the first time I've had a problem with A-Zoom, so I thought I would pass the info along.
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  2. Joenavy85 Member

    Member Since:
    Mar 15, 2014
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    Interesting, I'll have to try this with my A-Zoom's. I have used them in my Mini-14 and AR to simulate dud rounds for clearing drills, and haven't had any extraction issues in either gun. Maybe the specs on the MVP extractor are a little different. I'll try this out tonight on my 5.56 Varmint and let you know of my findings.
  3. Keith Moderator

    Member Since:
    Dec 7, 2014
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    I do the same on occasion as well as use them for action proving rounds after doing work on my firearms.

    Since I ran across this and don't have a reloading setup yet, I may have to ask one of my buddies who do to make up some dummy rounds with on powder or primers in them.


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  4. Joenavy85 Member

    Member Since:
    Mar 15, 2014
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    I think it may just be inconsistency of the A-Zooms, i just ran mine through my Varmint and it fed and extracted 10 for 10. I would imagine the tolerances for snap caps are a little loose compared to actual ammo. I'd say go with your idea and have a buddy "load" up a few duds. You could even have him leave the primer pockets empty and fill it in with hot glue
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  5. Keith Moderator

    Member Since:
    Dec 7, 2014
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    The glue is a good idea. I hadn't even thought of that.

    This is the first time I've had a problem with any of them. It's not a huge deal, just a tiny bit disappointing.


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  6. Ulfberht Training and mentoring the next generation.

    Member Since:
    Dec 23, 2015
    Message Count:
    111
    I made my own out of expended hulls, cases and erasers...

    My kids couldn't figure-out why the erasers on their pencils kept "disappearing"

    :D
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  7. Duaneh New Member

    Member Since:
    Nov 28, 2015
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    20
    Kieth wrote: Since I ran across this and don't have a reloading setup yet, I may have to ask one of my buddies who do to make up some dummy rounds with on powder or primer.

    I can make one for you. I have a few different 223 bullets or I can use what you have.
    I load a dummy round for myself! One for bullet manufacturers `book` length. One for max length set based off of a OAG LENGTH gage, one for minimum and one for max mag length. Then I decide what to use and what will cycle through -mag to ejection of round.
    Let me know or pm me your address I will send you one based on bullet book length.

    I will have to add the erasers to do safe trigger pull. I like that idea- thanks.

    Duane


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