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snuffy · October 9, 2011, 11:28 PM

A couple of ways. Get a "V" anvil micrometer, CAUTION, they're very expensive. Or, get a precision set of hole gauges.

Another way is to take the slug, try to pass it through the cylinder throats. IF you know what the throats measure at, you'll know if it's loose, just fits, or you can't get it to go through.

I'll bet it's a Ruger like my GP-100, five groove barrel. I slugged both the Cyl. throats with.380 pure lead balls, and the barrel. The Cyl. throats were .357, the barrel slug was a tight slip fit in the Cly. throats, so my revolver has matched throats and barrel the same diameter.

October 9, 2011, 11:28 PM	#4
snuffy Senior Member Join Date: May 20, 2001 Location: Oshkosh wi. Posts: 3,055	A couple of ways. Get a "V" anvil micrometer, CAUTION, they're very expensive. Or, get a precision set of hole gauges. Another way is to take the slug, try to pass it through the cylinder throats. IF you know what the throats measure at, you'll know if it's loose, just fits, or you can't get it to go through. I'll bet it's a Ruger like my GP-100, five groove barrel. I slugged both the Cyl. throats with.380 pure lead balls, and the barrel. The Cyl. throats were .357, the barrel slug was a tight slip fit in the Cly. throats, so my revolver has matched throats and barrel the same diameter. __________________ The more people I meet, the more I love my dog They're going to get their butts kicked over there this election. How come people can't spell and use words correctly?