Home Forums Hunting & Shooting Gunsmithing Addressing scope mounting problem/issue

There are two ways you can do the job that work well. One requires more tooling than the other. If you want two piece bases, you will need a straight rod (think ring lap) that can be used to establish the rear base height when all parts are assembled. You can then bed the rear base to correct the height difference. The better/easier alternative is to use a one piece base and bed the rear of it to the receiver when the front of the base is tight to the front ring of the receiver. Do not bed the front of either base to the front ring of the receiver to correct any angular issues. The front ring determines where the barrel is pointed, so if you bed to correct the angle at the front ring that you illustrated in your photos your rifle will shoot low to the point that it may be outside the adjustment range of the scope. Whether you choose a one piece base or two piece, the rear needs to be bedded or the height difference will put the scope tube under a huge stress if not bedded to be straight and stress free.

You cannot lap that problem out. You may get the rings circular by lapping the hell out of them, but it will be nowhere near parallel to the rifle bore. And there will not be enough adjustment in a scope to fix that. A taller rear base is in order. Being a r700 this is a no brainer…