You never cease to amaze me please do a follow up video

Great video, I have one of those sights in my collection. I always wondered about the mark, so I kept it aside.

I can confirm that the same 7.62x54r round out of an M91 does indeed exit the muzzle slower than a 91/30 with virtually all modern/semi-modern ammunition (back to the 1930s at least). You get about 40-50 more fps out of the 91/30. That still leaves a big gap in the historical record though, as the most interesting and experimental stuff going on was right after smokeless power was starting to get adopted and used. So anything WWI or earlier could include quite a few developments on powders, and the site calibrations that were needed to deal with them. But it does make sense that the Russians decided the M91 was needlessly long.

Excellent tutorial!

I have one that has been remarked for meters. Cool stuff. Thank you for your content.

I have an almost identical rifle from Finland. It was rebarreled in 1921 to dragoon length and has the same rear sight spring and KAB stamping on the rear sight. The only difference is that the font is larger and the stamping is parellel to the long axsis of the sight.

Thanks Big Sam 👍

Yes yes mine does thanks big sam

Very interesting

Big Sam is the man.

после революции 1918 года казаки были вне закона у большевиков,потому и было изменено клеймо с "каз" на "кав".

It is kaz, z in russian Look like 3 , same like old german. becourse the dragoon rifle for the cossak stamp like this. Dragoon rifle is shorter as infantry rifle and need other sign. Kaz is only a property stamp, the rifle are exactly the same rifle. Sorry for the english, iam from german. It is no cav stamp.... ok the russian guy below told it was a change to kab (cav).. learned samething ❤

Could the difference in sight size be due to geometry between the front and rear sight? If a barrel is longer the front sight will appear higher than the front sight on a shorter barrel at the same angle.

Kgb mossin nagant can you do a review on this?