762x54
I bought my first nagant and it is WAY TOO NICE to fire , I just could not do it. So I bought a second one and it was nice too but not quite as beautifull as the first one. I know you will not be let down.
Well anyway,, you DO NOT have to buy a conversion cylinder if you do not want. 32 SW long 32 smith & wesson long works fine and is not too costly. also someone is starting to make 7.62nagant ammo again and it should come down even more in price too.
the 32sw long is not very powerfull but none of them are. the only issue I have is once and a while the brass may crack a tiny bit but that is seldom, and not realy a problem for me. again it is not a powerfull round. I am not trying to talk you out of the conversion if you realy want it but just let you know you do not have to spend that cash on on a conversion.
I realy love the fact that the cylinder moves forward to seal in the gas when it fires. a great idea that is 100 years old , I do not see it happening on any revolvers today. I know you will like your nagant