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Turkey Blasters => The Blue Shoulder Club => Topic started by: BD1 on March 28, 2010, 11:02:46 AM

Title: Anyone have the inside Diameters for Rem 12 & 20 Gauge Barrel??
Post by: BD1 on March 28, 2010, 11:02:46 AM

Thanks Bill

Title: Re: Anyone have the inside Diameters for Rem 12 & 20 Gauge Barrel??
Post by: Sloppy_Snood on March 29, 2010, 10:47:21 PM

727" - .729" for Remington's standard 12GA 870 Express, 1187, 1100 Autoloader, 332 O/U Wingmaster RemChoke barrel bores (newer shotguns).

NOTE: Some older "Target" -stamped barrels were .735" to .746" Depends on the age of the barrel really.

.735" for Remington's 105CTi, 1100 – new, 1100 G3 - new, Premiere O/U Competition STS, Premiere O/U Field Grade, Premiere O/U Upland Special ProBore barrel bores.

.620" for new Remington 20GA RemChoke bores.

NOTE: I measure most at .615" - .617" if they are older than 2 years old from the year 2010 ).

Best bet Bill is to have a machine shop or gunsmith with a holtest measure it.   ;)