Instructables

How To Bed A Scope Base - Remington M700 .308 AAC-SD Tactical Rifle

Picture of How To Bed A Scope Base - Remington M700 .308 AAC-SD Tactical Rifle
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I will be writing a series of articles that will pertain to accurizing the Remington 700, subscribe and stay up to date as the work on this rifle progesses.

The build will include:

Bedding the scope base
Installing an aftermarket Timney straight trigger
Bedding the action in a Bell & Carlson M40 stock
Lapping the bolt lugs
Barrel break in
Reviewing the Badger Ordnance mini tactical bolt knob
Installing Burris Xtreme rings and Vortex Viper PST scope
Introduction to MRAD and the scope ranging reticle
No bullcrap real world accuracy results with a variety of ammo
Range report on the AAC Brakeout Compensator
Pros & Cons of the Harris Bipod 9-13 features

This rifle will be used as a coyote thumper and also at the local tactical shoots.
I will be updating with full reports and pictures as time allows.
 
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Step 1: The Rifle:

Picture of The Rifle:
Remington Model 700 SPS Tactical AAC-SD
Bolt Action .308 WIN Centerfire Rifle
20" Barrel with a 1 in 10" twist
Advanced Armament Brakeout Flash Suppressing Compensator
Hogue Black Overmold Stock


I have read many opinions on whether bedding a scope base actually helps or not. The following photos will show why I think it is not only practical but mandatory for a precision rifle build.


Why bed a scope base?

Quality scope bases are machined to very tight tolerances. The top of most production firearm receivers do not enjoy this level of care and results in mounting a very straight piece of metal (scope base) onto a receiver that has run out.

This run out is very easy to determine and if not corrected can result in vertical stringing of bullet groups.

The way it works is if the front and rear of the base does not lay flat when tightened down, it will bow the scope base to conform to the profile of the receiver. This bow will then keep the scope mounts from lining up with one another and the stress is then transferred to the scope tube once the scope is mounted.

The scope base must lay perfectly flat and in an unstressed position on the receiver.
jtv30625 months ago
Nicely done. I don't know why people always want to lap perfectly good rings.
zacker1 year ago
lol...good call on the wrench end of the bolt handle!
zacker1 year ago
So with only those tiny screws holding this onto the rifle, it doesn't come lose over time?
Thanks!
djzadjza1 year ago
This is really helpful. I am actually in the purchasing the exact same model of gun as you are working on. I have heard bad things about the hogue stock though. What are your thoughts on it?
foodplotsurvival (author)  djzadjza1 year ago
I'm not impressed with the stock. The rubber really catches on my clothes and the stock itself has too much flex in it. I put an order in for a Bell & Carlson stock but like everything else in the firearms industry right now it is on backorder.
Yeah everything in the firearm industry is crazy right now, especially with all the panic buyers. I like the bell and Carlson stock but I was also thinking of the choate tactical