Quote:
Originally Posted by Hapworth
On S&W revolvers headspace is either in spec or it isn't; a go/no-go gauge is used to determine clearance for minimum and maximum specs. So long as the revolver's headspace accepts the "go" side and rejects the "no go" side of the gauge, all is in order.
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A no go gauge is longer, so it is the same wrt S&W revolvers.
I’ve used feeler gauges, as explained in Kuhnhausen’s book.