if you get a sticky case put the bolt in the open position and drop the cleaning rod down the bore while applying pressure opening the bolt. dont beat the handle to open you can break the extractor easily doing that.
mosins do not have chrome lined chambers and post war 7.62x54r surplus is designed to be used in chrome lined chambers. heating the chamber and letting the lacquered steel cases sit in the chamber will coat the chamber in lacquer residue.
to clean a suspected chamber of the lacquer residue use 20ga mop and denatured alcohol. swab the chamber then use patches to wipe the residue out. conversly you can use denatured alcohol to clean unfired steel rounds your going to shoot immediately. the purpose of the lacquer is to prevent rust. copper washed steel cases are not lacquered coated but have a thin copper layer to prevent rust instead of lacquer
if it still sticks you prolly have a chamber burr but try cleaning it first.
last resort if it is still sticking your going to need to remove the burr. however this can cause a dangerous situation if you start willy nilly removing chamber material. too much metal gone means gasses blowback around the case and the bolt and into your face. the easy way is take 20ga bronze brush an old cleaning rod section and chuck it into a variable speed drill and spin it at slow speed for a bit. clean the chamber out and try shooting again. repeat until burr is gone.
that may take some time.
getting denatured alcohol on a mosin stock will instantly remove the lacquer finish. it will bubble it up into a sticky gummy substance do NOT get it on your stock unless you intend to refinish it
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Last edited by JonM; 03-18-2012 at 02:43 AM.