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like Frank Said...
Like Frank said,but i soak the bolt for a day or so in Kreo in a coffee can. slosh it around every so often. it seems to really get into the tight places and disolve and soften any varnished oils or grease from yrs gone by. make the final cleaning easier. When you have it apart if the firing pin has any rough spots ,polish it up abit I lay mine on a fine emery paper on a piece of glass and wet polish it with oil to polish the sides ,clean the striker and spgs and lightly lube, If it worked b/4 you "cleaned " it you almost had to disolve something and it got to where it is slowing the firing pin as Frank stated. 