Talk:Berdan Rifle

Additional Images

A family of Berdan No.2 rifles: 1 - Infantry rifle, 2 - Dragoon rifle, 3 - Cossack rifle, 4 - carbine.

Russian Berdan № 2 (M1870) Dragoon rifle - 10.75x58mm R

Berdanka bolt action shotgun - 28 Gauge

Russian Berdan caliber - 10.67 vs 10.75 mm

I see that the caliber is changed from 10.67 to 10.75 mm. This is not so simple. The Russian designation of the caliber was "4.2 line", i.e. .42 inch. As the calibers in Russia were measured between the lands in the rifling and not the grooves, the Russian designation of the caliber in mm is 10.67, while the Western method of measuring gives 10.75. Same thing as with 9 mm PM, for example, that has the real diameter of the bullet 9.27. But all reference books call PM bullet 9 mm. Same thing with Berdan bullet, at least in Russian reference books - it is called 10.67 (as well as Smith & Wesson Russian revolver that is also "4.2 line"). I'm not so sure about how the Berdan caliber is designated in English reference books. But still I think that replacing commonly used 10.67 to may be more correct but less common 10.75 without any discussion isn't good. Thanks for any opinions. --Greg-Z (talk) 00:55, 22 November 2021 (EST)

I was looking for information on the caliber for over two hours. Caliber "10.67" appears only on the pages of the IMFDB website. Any other source says "10.75". Each one Wikipedia. Every single page. All sources state the caliber 10.75.--Emto_PL (talk) 07:07, 22 November 2021 (EST)