Finally remembered to bring home my other dial indicator - it only reaches in 5". The step is .020 - a couple of brass 10ga shells measure .010 wall thickness with a .800 ID. Far as I can tell the bores are .800 . So it should be a smooth transition from shell to bore. The plastic wads are just under .800. I just don't know - it doesn't make sense. A friend has some 7625 - try a couple of shells with it. Paul
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Paul Harm
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