RimfireCentral.com Forums - View Single Post - Accuracy issues and keyholing?
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Old 05-26-2021, 06:19 PM
RedShift556

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Apr 2021
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MI
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Bit of an update, I think you guys may have been onto something with the crown. It had some suspect looking machining marks that I guess are called chattering. Didn't take any pics but I wound up finding this:

https://www.ar15.com/forums/handguns...me_/50-128225/

A guy from 2012 with the same problem, same model, from the exact same time period I bought this MKIII. Looks like the targets he posted also show some slight keyholing.

Anyways, after seeing the chatter marks and coming across that thread I called Ruger and sent it back again.
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