Originally posted by Kswhitetails
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Thanks for replying
Picturing what you are saying in my head I can only see a squared upper still being out of alignment and needing more glue on one side than the other if the nose of the upper is out of alignment with the upper itself (scenario 2 in the diagram). i.e. the bore of the upper is out of alignment with the bore of the nose. In that case how do you know which direction to bias the barrel to align the axes when you put it all together?
Note scenario 2 in the diagram the nose is closer to side A than B, a manufacturing fault. If however you make the mistake of biasing a random side on a perfectly true upper then you just end up with parallel axes, Scenario 1. Parallel axes, while not perfect is still more preferable to an untrued nose (Scenario 3), where the upper axis is at an angle to the barrel. And if you end up accidentally putting more glue at 12 or 6 O'clock then the elevation knob on the scope makes it a non-issue.
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