well.........
The carbines might make good truck rifles when you knock the bayonet off.
Any Nagant I've shot seemed to kick unreasonably hard w/ heavy ball ammo.
Many likely saw marginal maintenance. I've also read that many barrels were rechromed, further reducing whatever rifling was left.
But, the russians used select nagants as snipers, I've read some articles stating how attemtion was paid to bedding and they were shot for accuracy.
And the 54R cartridge, despite its age, is much a round, equal to the '06 in power, and the Soviets retained it in the SVD sniper
You can't beat the price of the rifles, and still, the ammo, these days.