How was the 30 cal ordnance spline block used and what was the purpose?
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Ordnance spline block
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Damn!!! I've been looking for one of those for a while. The one I have has a replacement spline on it, and while it works it's not very attractive looking.
Yes, it's used to check the timing / index of a barreled receiver. It's supposed to be used with a precision-ground flat of granite block. Damn nice find there!Welcome to the Addiction!
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