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Unread 04-05-2014, 11:53 PM   #131
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Richard B. Hoover
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Carl,

It is much easier to just use a micrometer to measure the dimensions of the bores. Remember, it is the barrel bore diameter (not the chambers) that determine the gauge of a shotgun. Shotshell diameters were very well established by the time the Parker Bros. shotguns (both back action and front action) were first being made. And the diameters have not changed since that time---except the 10B, 11B, and 12B have gone extinct.

You can use modern shells to perform a simple test of the chambers of an early under lifter Parker Hammer Gun:

1. A modern 14-ga shell fits perfectly in the chambers--gun was chambered for either a 14-ga. Paper or 12B brass shells. Gun could be a 14-ga but probably a 12-bore.

2. Modern 12-ga Shell fits--gun was chambered for 12-A brass or No. 12 paper shells. Gun probably a 12-ga but it could be an 11-ga Parker.

3. Modern 12-ga shell is loose and modern 10-ga shell will not go in chamber --- gun is most probably an 11-ga Parker.

4. Modern 10 ga shell fits---gun is probably a 10-gauge.

Richard
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Unread 04-06-2014, 12:13 AM   #132
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Carl Baird
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Richard,
My gun is not a under lifter, it's an old hammer gun. It was made in 1884, and as you recall, the bore measured .754. The letter from Parker says it's 12 ga. and a modern paper 12 ga. fits fine. Are you saying that a brass 11 ga. might fit it?
Is this 11 ga. issue more related to the old Parker under lifters?
Carl
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Unread 04-06-2014, 09:24 PM   #133
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Richard B. Hoover
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Carl,

Absolutely. Almost all of the 11-ga Parker's we're made before 1876. Some were chambered for the 11 paper or 11-A brass shell, but many were chambered for 12 paper or 12-a brass shells. A heavily pitted or honed 12-gauge barrel can measure as an 11---but it is still a 12
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Unread 04-06-2014, 10:10 PM   #134
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Richard,
Thanks very much.
Carl
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