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Unread 06-14-2021, 07:56 AM   #11
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Dean Romig
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Quote:
Originally Posted by Roberto S Siciliano View Post
So here's what I found out.
The wall thickness at the muzzle is 1.32mm [0.0519685"].
The left barrel gauges at full choke. The right barrel is in the 10ga range. Could this be factory... or was the right barrel re-bored. Is 0.0519685" muzzle thickness acceptable?
Photos are attached.
Comments appreciated.

The wall thickness at the muzzle is not where you need to take measurements for safe shooting. Barrel wall thickness to determine minimum wall thickness must be taken along the entire lrngth and circumference of each tube. Thin spots can show up anywhere. Thin spots can also support a suspicion that barrels may have been honed.





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Unread 06-14-2021, 08:34 AM   #12
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Leave that drop in gauge in the drawer if you are dealing with any Parker made before the 1920s.
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Unread 06-14-2021, 09:23 AM   #13
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Got it!
Thx


Quote:
Originally Posted by Brian Dudley View Post
Leave that drop in gauge in the drawer if you are dealing with any Parker made before the 1920s.
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Unread 06-14-2021, 11:53 AM   #14
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Parker Bros. guns made in the 1870s and 1880s are well known to be seriously over-bored. I have an 1889 12-gauge that mics .757".

Ammunition loading companies offered special shells for Parker Bros. guns with a size larger wads. See Loads No. 56 & 57 --

1886-7 page 6.jpg

1886-7 page 7.jpg
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Unread 06-14-2021, 11:56 AM   #15
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Duplicate post

Last edited by Dave Noreen; 06-14-2021 at 11:57 AM.. Reason: Duplicate post
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