Difficult extraction on a Mosin Nagant. Solutions ?

[u/Murray3-Dvideos]

Reluctantly bought a generic *run of mill* 91/30 for an embarrassing price. It has a frosty bore, but otherwise seemed to be in good - great condition with pronounced rifling.

I thoroughly cleaned the gun including the barrel and chamber.

The bolt cycles buttery smooth, chambers and extracts unfired rounds fluidly. But when fired, I gotta halfass slap the bolt up and partially back before the spent casing will properly extract.

To improve extraction, does this sound like something a good chamber polishing would solve ? Or is there some other quirky Mosin remedy I'm unaware of ?

[u/XilingolShepherd]

During the Korean War, some Chinese soldiers even have to physically kick the bolt to get it open…