How to fix PU scope Sighting on Mosin Nagant?

Re: How to fix PU scope Sighting on Mosin Nagant?

feeds@yuku.com (Gabreski 1st FJ) — Sun, 30 Nov 2008 10:33:55 GMT

Hey well at least Im not using a screwdriver from dollar general on my guns

Re: How to fix PU scope Sighting on Mosin Nagant?

feeds@yuku.com (eb in oregon) — Sun, 30 Nov 2008 01:39:06 GMT

My shim is just a piece of clear plastic I had laying around.

Barbarian.

Re: How to fix PU scope Sighting on Mosin Nagant?

feeds@yuku.com (Gabreski 1st FJ) — Sun, 30 Nov 2008 01:15:07 GMT

Just to clarify a bit you would shim underneath the mount where the large screw is. There should be two pads one at the top and one at the bottom of the mount that contact the receiver. Judging by where your reticle is in relation to the bullet strikes they probably have already been ground a bit. If you dont like shimming you can always put two small beads of weld where the pads are and file these downby hand. Wont hurt or discolor if you keep it small and quick. My shim is just a piece...

Re: How to fix PU scope Sighting on Mosin Nagant?

feeds@yuku.com (eb in oregon) — Fri, 28 Nov 2008 20:06:31 GMT

Yes. This technique works for all rifles whether horizontially or vertically mounted. Just be sure to center the reticle before doing any shimming. If you've never done this, just turn the turret all the way in one direction, count the clicks (or number of turns if it doesn't click) as you turn it all the way back until it stops, then go back the previous direction one half the number of clicks (or turns) you counted.

You can do the same thing with the verticle adjustment...

Re: How to fix PU scope Sighting on Mosin Nagant?

feeds@yuku.com (MaverickNH) — Fri, 28 Nov 2008 17:03:00 GMT

So, I'd want to loosen the locking screws and then the attaching screws to slip a shim in between the base and receiver, right? I just want to be sure I'm following you correctly, being a novice Mosin Nagant owner.

Re: How to fix PU scope Sighting on Mosin Nagant?

feeds@yuku.com (eb in oregon) — Thu, 27 Nov 2008 22:09:03 GMT

If you have to shim, it is in-between the mount base and the receiver. Use shim stock like a feeler gage. Buy a cheap set and start with about a .005 shim. Shoot and shim just the back end of the base until you find the right size. Cut off a small piece that just fits under the mount base, locktight and tighten.

The basic problem using this technique is that the screw pressure must be consistant and firm. And, it is possible to ruin a screw that may already be marginal. You can try...

Re: How to fix PU scope Sighting on Mosin Nagant?

feeds@yuku.com (chcusnr1) — Thu, 27 Nov 2008 10:59:12 GMT

Look at Figure 7 on page 4. The inset shows the legs on the base. Those should show grind marks. Not sure what you would use to shim - I've never done the shimming - always been able to resolve the zero issue with grinding. See my post on restoring my Yugo sniper.

Re: How to fix PU scope Sighting on Mosin Nagant?

feeds@yuku.com (MaverickNH) — Thu, 27 Nov 2008 06:28:46 GMT

chcusnr1 wrote:
Good article on this at
http://www.owrpc.co.uk/images/mnpu.pdf

Jim

Helpful, but I'm still not clear on where the shims go, as I can't quite...

Re: How to fix PU scope Sighting on Mosin Nagant?

feeds@yuku.com (chcusnr1) — Thu, 27 Nov 2008 02:12:51 GMT

Good article on this at

http://www.owrpc.co.uk/images/mnpu.pdf

Jim

Re: How to fix PU scope Sighting on Mosin Nagant?

feeds@yuku.com (MaverickNH) — Wed, 26 Nov 2008 20:10:15 GMT

Yup - that's what I'm seeing. The reticle is up and right.

Thanks for the advice. Where would I want to be inserting those shims?

Re: How to fix PU scope Sighting on Mosin Nagant?

feeds@yuku.com (Gabreski 1st FJ) — Wed, 26 Nov 2008 19:24:03 GMT

Its best to do this at the range or with a laser bore sighter. (easiest with a laser) If im not mistaken I believe your going to have to shim to bring the scope FOV to the right so that your laser or bullet impacts line up with the reticle once its centered within the FOV. Up and down isnt an issue as you can use the adjusting screws on the mount to center it.

Re: How to fix PU scope Sighting on Mosin Nagant?

feeds@yuku.com (Gabreski 1st FJ) — Wed, 26 Nov 2008 19:20:14 GMT

Im assuming you mean the reticle is in the top third of the FOV and also 1/4 of the FOV away from the right side of the scope?

How to fix PU scope Sighting on Mosin Nagant?

feeds@yuku.com (MaverickNH) — Wed, 26 Nov 2008 08:26:35 GMT

A Mosin Nagant sniper I'm fixing to buy shoots 1-2 inch groups at 100yd, but the reticle is about 1/4 right and 1/3 high. I'd like to grind/shim to center. If anyone has some advice on how to do that, I'd appreciate the help. What to grind/shim, how to do it and how much to correct- stuff like that. I have files and a Dremel, so it needs to be simple.