What Causes Doubling?

[J. Scott Hanes]

Where can one purchase a chamber gauge? A good, accurate, one.

[Dean Romig]

Do you simply want to measure depth or ID as well?





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[Researcher]

The problem with all chamber gauges is that they are made to present day industry specs, while the chambers of many, if not most, vintage doubles were not. Using a machinist scale is often much more accurate.

[Bill Jacobs]

When I was in gunsmithing school, I made the gauge in the photos along with .410, 28, 20 16 and 10 gauge models. We made them (as I recall) 0.005 inches less in diameter than the minimum SAAMI chamber spec. I have not yet run into a chamber that I couldn't use them in.

Bill Jacobs

[BRDHNTR]

Brownell, connecticut shotgun among others have chamber gauges for sale.