Question on JA barrels

**Mike D** · 12-26-2010 04:04 PM

Was the 2-groove rifling on JA barrels used for the M1917 the same as the 2-groove barrels used on M1903A3's (rifling the same as 4-groove '03 barrels with 2 grooves omitted)?

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**Highly Recommended** · 12-26-2010 04:04 PM

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Manufacturer of various vintage rifle scopes for the 1903 such as our M73G4 (reproduction of the Weaver 330C) and Malcolm 8X Gen II (Unertl reproduction). Several of our scopes are used in the CMP Vintage Sniper competition on top of 1903 rifles.

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Here at T-bones Shipwrighting we specialise in vintage service rifle: re-barrelling, bedding, repairs, modifications and accurizing. We also provide importation services for firearms, parts and weapons, for both private or commercial businesses.

**singleshotcajun** · 12-30-2010 10:21 AM

The Johnson Automatics US 1917 replacement Barrel has two grooves and two lands that are equally spaced. The rate of twist is 1 in 10". My WWII rebuilt 1917 with JA barrel slugs .3078" on the grooves and .300" on the lands, it is one of my best shooting service rifles. This does not quite answer your question but my Remington 1903 A3 two groove barrel internally seems identical to the JA barrel in terms of twist and spacing.

**Mike D** · 12-30-2010 07:38 PM

Thanks. Welcome to the forum!

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