How to Measure Shotgun Bore Diameter and Barrel Thickness | MidwayUSA Gunsmithing

The two most critical dimensions when working on the barrels of a shotgun is bore diameter and barrel wall thickness. It’s easy to take these measurements when you have the right tools. Watch along as Larry Potterfield, Founder and CEO of MidwayUSA, introduces the tools and methods for taking these measurements. A Skeet’s Bore Gage will be used to take the bore diameter measurements and a Newboult and Thorpe Barrel Wall Thickness Gage to measure barrel wall thickness.
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[@minerblue9641]

"Thats the way it is". A simple statement that I like so much.

[@johnfriedmann2413]

Always like these videos. Minor correction: I think the first gauge is a STARRETT not a SKEETS.

[@propdoctor21564]

Always have enjoyed Larry's videos... And that's the way it is. 😁😁

[@r.tristaocutelariacustom6192]

Estava sentindo falta de seus vídeos...que bom que voltou a envia-los.....aqui no Brasil não existe um profissional como você.

[@ajingolk7716]

What tool is used to check if the barrel is not twisted and straight ?

[@carlossanchez5600]

Great video Larry.!!!!!!!!!!!!!!!!!!!!!!

[@hawkenman.549]

Wall thickness is a very critical dimension for safety. That’s why you get a component gun smith who has the proper tooling and knows how to use them. Better to be safe than sorry. If you have a questionable shotgun-don’t think about shooting it until this very important criteria is determined.

[@KnottingleyGuns]

I have searched the internet for a supplier of these tools that will ship to the UK without success .. any help in obtaining them at a reasonable price would certainly be appreciated.

[@alancollard8939]

yes but what are the dimensions at these points,

[@Sailingpilotchris]

Do you offer sleeving for side by side shotguns?

[@ngzcaz]

Sooo... for us non machinists does this mean my 6 in digital calipers are useless ?

[@leeenfield4900]

Vernier Caliper has a clearance problem measuring inside of bore. You must get past the first 2 or 3 inches at the muzzle. 5/8" - 3/4" Telescoping Gage might work. Unless you have a very good quality Vernier I'd suggest you also need a 1" Micrometer. Precision gets expensive in a hurry. Starrette and Mitutoya are reliable makes.

[@leighobermaier5050]

no info given on what the dimensions should be

[@senseibo4401]

Depends on what size bore shotgun.

[@dustinwallace21]

Couldnt you just use a caliper?

[@mattbrown9484]

Ultrasonic tester