Be very careful on your Mosins when you strip them down and reassemble them. The stocks are mostly Arctic Birch and relatively soft. If you over torque the guard screws the bedding/ways will get sloppy and the mag well will press against the bottom of the receiver instead of just clearing it.
I just realized I sold my Hex receiver 1930 PE sniper last fall. I wasn't shooting it and a young fellow with lots of money really wanted it so the mercenary in me let it go after enjoying it for 25 years. Now, I have three round receiver M91-30 snipers left. Two with PU and one with a PE. Two of them are excellent. One is from the MOLOT batch and one is Russian. The PE is a Tula rifle in VG condition. All of them shoot very well with good ammo. The Russian, which looks like it was dragged across the Kursk battlefield. The stock is beat to hell and there is zero finish on any of it. The scope has been repaired and refinished and marked to the rifle. May be a replacement. Doesn't really matter. I like it. It also outshoots any other Mosin I have as well as most other milsurps.
Just looked at the New England Westinghouse that was refurbed by the Finns. All they did was to reblue it and finger joint the stock. It looks a bit funny as the stock has a birch fore end and a walnut butt. It doesn't have the normal pine tar finish either. Looks like some sort of oil or wax. Lovely rifle. Thing is it only has a 70% bore at best. The bore diameter measures out to .309, even with the wear. It shoots selected handloads with .311 diameter 154 grain bullets into MOA consistently. Of course it has the hex receiver as well. Both of my Finns with hex receivers have as new stocks with finger joints and the barrels are at least 4 inches longer than the rest of my Mosins.
The rifles that really shoot well and don't require a lot of maintenance are my 91/30s with laminated stocks. The blond laminates are nice but the RED laminates are very nice. The Mosins with the laminated stocks are starting to get hard t come by. Not impossible but ????