Scope Shimming

Discussion in 'Gunsmithing' started by varminthunter98, Jul 6, 2014.

  1. varminthunter98 New Member

    Member Since:
    Jun 22, 2014
    Message Count:
    21
    Hey guys, does any one out there know anything about scope shimming? I was just messing with my MVP today, and realized my Vortex Viper only had 16 MOA of up elevation adjustment. I looked at the Burris signature rings, but I like the price of old pop cans a lot better. I think I would rather shim between the rear base and the rifle instead of the rings, is that a bad idea? Any advise would be much appreciated, thanks!
  2. jim243 Member

    Member Since:
    Feb 13, 2014
    Message Count:
    44
    I was hoping to find out too. I just changed my rings to get more adjustment hope it works out.

    Jim

    [IMG]
  3. SilverDuck New Member

    Member Since:
    Apr 12, 2014
    Message Count:
    4
    You might want to consider buying a one piece rail with 20 moa built in instead. That way your rings will remain aligned properly rather than having the body of your scope going through them at an angle.

    Haven't needed to add elevation to my 556 mvp varmint (yet) since my club range is only 200 yds, but I did add a 20 moa rail to my 22 lr to shoot at the 200 yd line and have been very pleased with how it worked out.
  4. jim243 Member

    Member Since:
    Feb 13, 2014
    Message Count:
    44
    I can not find a 20 MOA rail that will replace/fit the MVP's, if you know of one let us know. Brownells carries them for Browning, Savage, Ruger, Sako, Tikka & Remington, but no Mossberg. Midway USA carries a Nightforce one but requires a gunsmith.

    Thanks
    Jim
  5. boostless Active Member

    Member Since:
    May 5, 2014
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  6. jim243 Member

    Member Since:
    Feb 13, 2014
    Message Count:
    44
    EGW At $70.00 plus shipping, I don't think so.

    Jim
  7. boostless Active Member

    Member Since:
    May 5, 2014
    Message Count:
    201
    If you don't want to spend the money on an EGW rail then your probably not going to find one. Weaver stated that they won't even begin prototyping for the MVP until some time into 2015. I got that in an email from Weaver if anyone is wondering.
  8. Jeb Member

    Member Since:
    Oct 26, 2013
    Message Count:
    79
    The egw mount is a good piece its worth the 70 bucks
  9. GrocMax Active Member

    Member Since:
    Jun 12, 2014
    Message Count:
    167
    Bite the bullet and spend the money on the sig zee rings and an insert kit.

    Personally not a fan of EGW rails, but right now our choices are pretty limited it seems.
  10. boostless Active Member

    Member Since:
    May 5, 2014
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    201
    I am not fond of the EGW either we are slim on choices for this rifle.
  11. X Ring Accuracy Member

    Member Since:
    Apr 13, 2014
    Message Count:
    60
    A pop can thickness is not a good way to shim. 40 years ago, agreed. The EGW is your best choice. Do you have any idea what .010 shim means at, say 100 yards, or 500? Its ALOT
  12. wood chucker Moderator

    Member Since:
    Dec 19, 2012
    Message Count:
    1,627
    Double check your bases to make sure you have a #19 front and #36 rear.

    One fella reported that his had the wrong (too short ) front base. It can happen.

    I'll look for the thread
  13. bluealtered New Member

    Member Since:
    Aug 17, 2014
    Message Count:
    24
    You may be able to get a shim kit from midway. The DNZ one piece scope base shimmed would be best, (if they make one for mossberg). A simple way to correct the two piece rings after shiming is a 1" wooden dowl with 360-400 grit sandpaper and lap the inside of the rings, just do it a little at a time or you can ruin them. Another trick i have used is just glue small strips of felt inside the top and bottom of the rings where the scope rests and it will help a-line the scope. (this works with cheap rings well) Last but not least, don't over tighten your rings to the scope, no matter what they don't need to be more than 10-15 inch pounds, just using your allen wrench can torque them way past that.
    wood chucker likes this.

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