Chamber problems
About hard turning bolt:
A little tune up of the bolt body and cocking piece is all it needs.
If you look on the top of the cocking ramp/cocking piece you'll see a little ridge, if you look on the bolt body you will see a corresponding V groove in the bolt body that the cocking piece sits in in the cocked/open position.
If you stone down the top of the V in the cocking piece and touch up smooth the edge's of the V groove in the Bolt body you will have a much smoother break/closure during the initial turning down of the bolt.
Another area to look at is for Chamber burrs in the 2:00 o’clock to 5:00 o'clock from the extractor rubbing against the chamber end (closing bolt on empty chamber) and rolling a burr into the chamber, check for scrapes in that area from extraction, if you have them you will need to deburr and or polish chamber edges.
You do not need to cut any coils off of the firing pin spring to get a smoother less effort bolt lift to load the Moison 91 rifle.
The Moison 91/30 and all its variants already have a very slow lock-time due too the heavy mass of metal/parts (cocking piece) attached to the firing pin and spring, removing firing pin coils only slows down the lock time more and may cause misfires (light striker hits) in cold weather.
