KCSO
07-02-2012, 11:38 AM
Although you can't get rid of alll the creep in a Mosin trigger you can make a world oof difference in the trigger with some carefull work. I just took a M/N Russian gun from 9 pounds to 4 pounds with just a trace of creep. That is the good news the bad news is that you can expect to put 2 hours or more into the job and you willl need a few tools. You will need a 11/64 drill and a reamer for #17 drill or a .173. This is based on the measurments of the Russian rifle I have in had. The trigger pins vary in size somewhat so you will have to measure FIRST. The object here is to pivot the trigger smoothly with out any side to side play. The receiver and trigger in most of the M/N are soft and you should have no trouble drilling and reaming the holes to size, then fit a pin made from the proper diameter drilll rod. I harden mine with Upper Missouri hardening compound.
Next polish the sear face on the bolt and the face of the trigger. POLISH do not change any angles and use a stone and work to keep the surfaces square. Then when it looks nice and smooth I buff the faces with a soft wheel coated with tripoli, the object here is to have the faces as smooth as possible but not to grind off metal or lose any of the hardened surfaces.
Next you need to polish the inside of the trigger where the spring rides and not for the tricky part...
Youo will need to draw file the sides of the combination sear and sear spring and remove slowly and carefully about 1/16" of metal from the rear of the sear/spring combination. Go slow and re assemble and try as you go. To reduce the creep I cut a shim from brass stock or aluminum and put it under the pad of the sear/spring where the screw holds the unit to the frame. Usually 15 to 20 thousands is about right.
Then when the job is all done I use Brownell's Action Magic on all contact surfaces.
The pictures show the narrowed spring with the shim underneath, the hardened pin in the trigger and the polish on the sear engagment of the bolt.
This trigger measures exactly 58 Oz on my RCBS trigger pull guage and will holt when hammered wth a 2 pound rubber mallet on the stripped action. It compares favorably with the replacment Huber unit that is currently selling of about $90.00 and all it takes is slow carefull work.
Next polish the sear face on the bolt and the face of the trigger. POLISH do not change any angles and use a stone and work to keep the surfaces square. Then when it looks nice and smooth I buff the faces with a soft wheel coated with tripoli, the object here is to have the faces as smooth as possible but not to grind off metal or lose any of the hardened surfaces.
Next you need to polish the inside of the trigger where the spring rides and not for the tricky part...
Youo will need to draw file the sides of the combination sear and sear spring and remove slowly and carefully about 1/16" of metal from the rear of the sear/spring combination. Go slow and re assemble and try as you go. To reduce the creep I cut a shim from brass stock or aluminum and put it under the pad of the sear/spring where the screw holds the unit to the frame. Usually 15 to 20 thousands is about right.
Then when the job is all done I use Brownell's Action Magic on all contact surfaces.
The pictures show the narrowed spring with the shim underneath, the hardened pin in the trigger and the polish on the sear engagment of the bolt.
This trigger measures exactly 58 Oz on my RCBS trigger pull guage and will holt when hammered wth a 2 pound rubber mallet on the stripped action. It compares favorably with the replacment Huber unit that is currently selling of about $90.00 and all it takes is slow carefull work.