The Nagant revolver ammo chambers easily into the Ruger 30. Bullet diameter same and case dimensions seem similar enough. This and the strength of the Ruger would indicate the Russian cartridge should work safely. The only drawbacks are corrosive ammo and no gas seal benefit. Before I pull the trigger (pun intended) am I missing anything?
Looks like the rim doesn’t sit flush enough. Tolerances too tight on Ruger chambers.