Number of lands and grooves

In American-made hand guns the most common numbers of lands and grooves are 5 and 6, though others have been used. Hopkins and Allen, Plant's Mfg. Co., D. Moore, Remington (.50 cal. 1867 Navy Pistol), American Standard Tool Co., Iver Johnson, and others have used three-groove rifling, but no guns in current production have three grooves. Two-groove rifling was used for the M-3 Machine Gun during World War II, but apparently never has been used in pistols or revolvers, and probably will not be. Four-groove rifling is very uncommon in U.S.made hand guns but the Schall Company used it in their .22 cal. pistol. In foreign countries four-groove rifling is still common though several have changed to six-groove. Seven-groove rifling is no longer used in the U.S., although it was used in the Mod. 51 Remington automatic pistol, in a number of early Colt pistols, and by the Metropolitan Arms Co. Abroad it has been used extensively by Webley and Scott in England, and was also used in some of the Belgian Francotte revolvers. Eight-groove rifling has been found in a 7.7 mm. Bittner made in Austria and in a 9.4 mm. German revolver marked J. H. Damm. Eight-groove rifling was used in the Schmeisser Mod. 2 for pistols whose serial numbers were less than 105,000 at which point six-groove rifling was adopted. Both the „Luna" and the „Tell" models of the .22 cal. Biichel Free Pistol made by Ernst Friederich Büchel at Zella-Mehlis, Germany, had eight lands and grooves. The .22 cal. Simson rifle (German) had eight grooves. And the Modelo Corla .22 automatic made by Fabbrica de Armas Zaragoza in Mexico also had eight, but as only 65 were made they are not likely to be encountered. Nine-groove rifling has been found in a „British Bull Dog" revolver of unknown make, ten grooves are used in the Wamo single-shot pistol, and twelve-groove rifling has been found only in the Galand revolver. The Marlin rifle now has 16, 20, or 22 grooves; but to date this new system of „microgrooving" has not been used in a revolver or automatic pistol. Most examiners probably hope that it will not be! As manufacturers do change the number of lands and grooves at times one must not assume, because he finds a specimen to have a certain number, that all guns of the same make will be rifled in the same manner.

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  • Ali Elias
    What are lands and grooves in firearms?
    3 months ago

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