Im building my first rifle 6.5 Grendel using a 20in MCGowen barrel and Aero Precision upper.
The receiver is flat top. If i use a digital protractor on the flat part of the upper and make it 0.0 then place it on the barrel, the barrel reads 0.2 low.
I assume this is a problem and will affect accuracy but im unsure.
Maybe the upper rail is not level with the bore of the receiver?
The receiver has been lapped with the drill style lapping tool.
Any ideas on how to proceed or how to check verify things?
Thanks for any help!
The receiver is flat top. If i use a digital protractor on the flat part of the upper and make it 0.0 then place it on the barrel, the barrel reads 0.2 low.
I assume this is a problem and will affect accuracy but im unsure.
Maybe the upper rail is not level with the bore of the receiver?
The receiver has been lapped with the drill style lapping tool.
Any ideas on how to proceed or how to check verify things?
Thanks for any help!
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