Handguns are funny critters when it comes to sighting them in. Iv you have a laser boresighter available, use it on one of the handguns you know is properly sighted in and check the sight alignment with the dot and set the new pistol up to match. Then soot it to do final sighting in. If a...
Mosin's original ammo is corrosive. so unless you are shooting modern production ammo made by a Modern ammo manufacturer such as Remington or Winchester, you need to treat it like a black powder rifle, that you are shooting real black powder in. This means if you are shooting surplus military...
Decades back we used to take the grips off and run them through the dish washer. Spray them down with a good colorless aerosol oil internal and external and wipe them down. (not joking in the least) However the newer pieces had sight inserts and white outlines that didn't hold up to the heat...