I took my Izevsk Arsenal Moisin Nagant M44 carbine to the range today. It is a minty post war (1946) rifle with a pristine bore. Moisin triggers vary but this rifle has a very good miltary trigger.
Since I got it it has suffered from Mosin "sticky bolt" syndrome. I have heard explanations of this phenomenon from old baked on cosmoline in the chamber to tight headspace. Before shooting I polished the chamber with a .50 cal brush to remove any possible preservative contamination.
Ammunition was 1953 mfg Romainian light ball and 1966 mfg Soviet light ball.
This was the first time I had ever shot the rifle at 200 yards and it was very satisfyingly accurate. If I did my part (I had two called flyers) the rifle had no problem holding "minute of thorax" on a sillouette target at 200 yards. Both types of ammunition hit at exactly the same point of impact.
The Romainian ammunition (brass cased) extracted and ejected easily and flawlessly. The Russian (copper washed steel cased) ammunition remained "sticky" to extract, though not as difficult as before I polished out the chamber. One Romainian case cracked at the neck. There were no problems but since no Moisin Nagant handles escaping gas well it was a reminder to wear shooting glasses even though I did not notice it until I ejected and examined the case.
I find Commie ammo to be very dirty and clean up to be a chore. I must say these two lots were an exception and a pleasant surprise. This was the cleanest Com-Bloc ammo I've ever shot. I cleaned as usual for corrosive ammunition. Two patches of USGI bore cleaner for corrosive primed ammo followed by two patches soaked in soapy water followed by two dry patches. The two dry patches at the end came out absolutely snow white. First time that's ever happened I must say.