Bedding material for one piece base

Discussion in 'DIY Projects' started by CamoToe1, Dec 18, 2013.

  1. CamoToe1

    CamoToe1 New Member

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    Recently ordered a Remington 700 SPS AAC SD in .308 from my lgs. I should have it by early January. I'd like to have my scope, rings and base all ready for when it shows up. The base I chose is a Weaver 20 MOA extended rail and Burris XTR rings. Scope I'm looking at is the 3.5-10x50 vortex viper.

    From what I've read most of these weaver rails require bedding under the rear attachment surface. My question is for anyone that has bedded their own base before. There are a lot of instructions online that use JB Weld as the bedding compound. Has anyone tried it? Should I use something else?

    Thanks in advance for any tips or suggestions.
     
  2. CamoToe1

    CamoToe1 New Member

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    ...Hmmm, not a single reply. "Hammer Condoms" got 4 replies, but bedding a sight base 0. LOL!

    Well, here's my progress thus far.

    ImageUploadedByFirearms Talk1387674407.451992.jpg
    Materials

    ImageUploadedByFirearms Talk1387674485.475650.jpg
    Definitely some play under the rear of the base. 3 -4 sheets of paper fit under the rear with the front screws torqued down.

    ImageUploadedByFirearms Talk1387674586.684047.jpg
    Daylight under the rear portion of the base.

    ImageUploadedByFirearms Talk1387674621.676659.jpg
    Next I coated the rear mating surface with a release agent. I used two layers of Kiwi shoe polish. I then buffed it off before applying the bedding.
     

  3. CamoToe1

    CamoToe1 New Member

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    ImageUploadedByFirearms Talk1387674808.504882.jpg
    Here I scuffed the rear of the base with 180 grit sandpaper. This will give the JB Weld something to bite to.

    ImageUploadedByFirearms Talk1387674869.609560.jpg
    Mixed equal parts of JB Weld steel epoxy until completely uniform in color.

    ImageUploadedByFirearms Talk1387674947.560502.jpg
    I then applied an even coat of epoxy to the rear of the base.
     

    Attached Files:

  4. CamoToe1

    CamoToe1 New Member

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    ImageUploadedByFirearms Talk1387675119.088211.jpg
    Here is how it looks after wiping the excess epoxy away with rem oil saturated qtips.

    ImageUploadedByFirearms Talk1387675176.151556.jpg
    Another shot.

    ImageUploadedByFirearms Talk1387675196.142743.jpg
    Gonna let it set up for 4-6 hours and then drill the JB weld out of the rear mounting holes while it's still somewhat soft. It'll then need to cure for another 18-20 hours before I can torque the base down and install the rings.
     
  5. LIBERTY2

    LIBERTY2 New Member

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    Looks like a good solid set up. Now don't forget to lap the rings and you;ll have a properly set up scope.
     
  6. CamoToe1

    CamoToe1 New Member

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    ImageUploadedByFirearms Talk1387724307.976000.jpg
    After 8 hours I pulled the mounting screws. It took a light tap with a hammer, but broke free easily. The surface is smooth and free of voids.

    ImageUploadedByFirearms Talk1387724395.788424.jpg
    Reinstalled the screws and will let it cure out for another 12-15 hours.

    It looks like my Burris XTR low rings are just a hair too low for my old scope's 50mm objective. I may wait to see how my new scope fits before sending these back. I would prefer it to be as close to the bore as possible.

    Is ring lapping absolutely necessary?
     
    Last edited: Dec 22, 2013
  7. duddie10

    duddie10 New Member

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    You lap the rings to make sure each ri g is true to the other one. Its keeps from tweaking your scope tube. And putting to much stress on the scopes internals. It also provides a better point of contact between the rings and the scope. Takes out high spots and any uneven surfaces. I would if your running the viper.

    Sent from my SPH-D710 using Firearms Talk mobile app
     
  8. tomgodd

    tomgodd Active Member

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    Great job! I done this very same thing to my Remington model 788 when I installed a EGW mount. No problems so far.

    Sent from my ADR6410LRA using Firearms Talk mobile app
     

    Attached Files:

  9. CamoToe1

    CamoToe1 New Member

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    Thanks! Here it is with the scope mounted. ImageUploadedByFirearms Talk1387948078.994606.jpg