I bought a Win 70 416 rem mag with a NECG Express Sight Installed but not filed. i don't have the first idea of how to procede. Can any one help with instructions or recomendations of a good gunsmith for the job.
Thaks
Dr B

First carefully file a small V notch in the top of the sight.Take it out and shoot it at 50 yrds. See where the bullet goes. If it strikes left, drift the sights left( always move the rear sight in the direction of the b ullet strike. Then if your lucky the bullet strike will be just below the point of aim. Now file the V deeper till its centered. If the bullet strike is high, you need to change the front sight blade to a taller one, then complete the process I just described. Time consuming but pretty easy. Finally get some Brownells 44-40 cold blue and clean up the sight.-Rob

I have done this on two of my rifles...may not be the correct way, but worked for me. This is done at the shooting range, by the way.
First: make sure the rear sight is centered. Scribe or somehow mark a line from the top of the rear sight blade to the bottom of it, making sure the line is in the exact center of the rear blade. Now match the top of the scribed line/rear blade with the front bead and shoot a shot at 25 yards...this will give you a good idea that the windage is on.
Second: get a VERY fine Swiss Needle file, I use a round one. I take a very light cut on the top of the sight at the scribed line. Imagine you are going to cut a "U" shaped notch. Make a very shallow cut. Now you can shoot a shot at the range at which you intend to have the rifle sighted for. Use a large target so you can see how high the shot hits.
Third: Repeat the second step, removing just a very small amount of metal each pass. Then fire another shot. If you do this carefully, you will gradually see the impact moving down the target.
Once you get the point of impact where you want it you will now have a deep "U" notch in the rear sight.
Now comes the difficult part. From the bottom of the "U" notch scribe a line to each side of the sight. Make sure this is even on both sides. Draw if first on paper so you can see the angle of the rear "V" you will end up with. My favorite matches my pre-64 M70 375 H&H rear sight. I can't remember the angle but that shouldn't be too hard to find.
Now I use tape from the bottom of the "U" shped notch in the rear sight to the scribed line on the rear of the sight that goes to either side of the rear sight (forming the "V") and then scribe a matching line on the front of the sight. I hope you understand how I am explaining this, but you end up with the the sight masked with tape so that any metal showing will be removed.
Now, using a safe cut file {one that only cuts on one surface of the file} start filing down to the mask.
Some people use a milling machine and get a beautiful straight line, but I never had access to a mill, so I did it with files. May not be exactly perfect, but worked fine.
A suggestion is to get some scrap steel some place and practice, practice, practice. By masking both front and back, you can keep a very flat, straight surface on the tops of the "V".
I know there are many other ways to do this, probably some much better, but this has worked for me on the two I have done. Just as a side note, the original WR 318 I owned, the rear sight looked to be hand filed, and not milled.
If this isn't clear, or you want to discuss it further, PM me and I will send you my phone # and you can give me a call. Hope this was of some help.

By Robogunbuilder!

"See where the bullet goes. If it strikes left, drift the sights left( always move the rear sight in the direction of the bullet strike."

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465H&H

quote:

Originally posted by Dr B:
I bought a Win 70 416 rem mag with a NECG Express Sight Installed but not filed. i don't have the first idea of how to procede. Can any one help with instructions or recomendations of a good gunsmith for the job.
Thaks
Dr B

I do believe someone posted on AR recently about a specific hand file that will cut the shallow-V notch into the blank blade. He posted the file manufacturer, file name/part number, mailing address and phone number as I recall. And if not mistaken, this file was specifically the correct angle for DGR express sights. If I find it, I'll post the link here.

Found it, posted by RECOIL ROB in Gunsmithing:

I'm thinking that a few months back someone was asking about what type of file to use to file down express sights. This is from the double gun board.


"You may be thinking of the thread which I posted in November of last year. After years of searching for such a file, I happened to mention my quest to one of my deer hunting friends. The day after we returned to work, he brought me two brand new ones. His employer was kind enough to donate them to a worthy cause. [Wink] [Wink] [Wink]

The file which you are looking for is called a cantsaw file. These ones are 6" long, 11/16" wide, are single cut with a nice fine cut which appears to be either #3 or #4, and cut smoothly and beautifully. They have the 120 degree included angle which you want for express sights. Some people prefer a shallower angle like 130-135 degrees but you'll not find such a file, to the best of my knowledge. These particular files were made by:

Wood-Miller Saw & Knife Ltd.,
5570 Ambler Drive,
Mississauga, Ontario, Canada, L4W 2K9.
Phone: 613-638-0244
Fax: 613-638-5616.

I'm pretty sure that Nicholson, which is now a part of Cooper Industries, makes a very similar file. They are located in the USA and may be more convenient for you to deal with, although cross-border shopping by mail is no big deal. I buy stuff out of the US like that frequently! "