Bedding material for one piece base


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Old 12-19-2013, 12:23 AM   #1
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Default Bedding material for one piece base

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.



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Old 12-22-2013, 01:12 AM   #2
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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.



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Old 12-22-2013, 01:16 AM   #3
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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.
imageuploadedbyfirearms-talk1387674997.130739.jpg  
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Old 12-22-2013, 01:22 AM   #4
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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.
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Old 12-22-2013, 10:09 AM   #5
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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.

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Old 12-22-2013, 03:07 PM   #6
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Default Bedding material for one piece base

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?
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Old 12-22-2013, 03:16 PM   #7
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Quote:
Originally Posted by CamoToe1 View Post
Attachment 130391
After 8 hours I pulled the mounting screws. It took a light tap with a hammer, put broke free easily. The surface is smooth and free of voids.

Attachment 130392
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?
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.

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Old 12-24-2013, 02:11 AM   #8
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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.

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1387851103897.jpg  
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Old 12-25-2013, 05:08 AM   #9
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Quote:
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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.

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Thanks! Here it is with the scope mounted.imageuploadedbyfirearms-talk1387948078.994606.jpg


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