1300 ft/lb vs 1450 ft/lb is, indeed, NEAR the “stopping power” (which isn’t real, so I used muzzle energy, which is real).
I’ll stick with a semi-automatic rifle over the Nagant any day.
Hell, I’d take an SKS before I’d take the Nagant.
Yes, if you have the money, get a semi.
But for the price of a GOOD AR, I could equip 6 marksmen with Mosins.
Quantity has a quality all it’s own. And a big honking bullet never hurts when you want to reach out and. . .double tap. . .someone. . . (evil grin). It’s just slower with a Mosin.
My criteria for a fallback weapon: simple, reliable, and cheap enough to stock a few of them. . .