Get that thing out to a full distance range... like at least 500 yards. Crank that rear tangent up to the range you are shooting at, and let her rip. Usually those Ruskie armorers have them sighted in close enough to get a hit on a man-sized target. I don't know how many Mosins I've picked up and had them be dead on without having to drift the sights or anything.
They are pretty capable rifles for what you pay for them. If it was all I had in a SHTF or martial law type situation, I could still do some pretty serious damage to any poodle shooter-equipped bad guys by staying outside of their max effective range. Get yourself some stripper clips and practice with them, and you can get to where you can load pretty quickly, too.