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Help needed on rear sight adjustment

Posted: Mon Aug 09, 2021 6:18 am
by Ditchblow
Hi, I have a Feinwerkbau M80 pistol and it is shooting high (10m) following a full service. I turned the rear adjuster to the right (H) and it has come to a halt (obviously at the end of the adjustment range), however, it is still shooting an inch high...anyone any ideas...many thanks.

Re: Help needed on rear sight adjustment

Posted: Mon Aug 09, 2021 9:15 am
by Rover
Are you using a sub-six hold?

Re: Help needed on rear sight adjustment

Posted: Mon Aug 09, 2021 10:28 am
by Ditchblow
Ummmm.........not sure I know what that is

Re: Help needed on rear sight adjustment

Posted: Mon Aug 09, 2021 12:55 pm
by -TT-
Sub-six means you align the sights below the black.

This note is interesting, in the Model 80 manual...
Screenshot 2021-08-09 135324.jpg
Screenshot 2021-08-09 135324.jpg (10.83 KiB) Viewed 2215 times

Re: Help needed on rear sight adjustment

Posted: Tue Aug 10, 2021 4:55 am
by David M
-TT- wrote: Mon Aug 09, 2021 12:55 pm This note is interesting, in the Model 80 manual...

Screenshot 2021-08-09 135324.jpg
The recoil lock and centrefire weight selector are on the M65 only.
Not fitted to the M80.

Re: Help needed on rear sight adjustment

Posted: Tue Aug 10, 2021 12:33 pm
by David M
Just an idea, if the shots are going high...
Check that the Foresight blade insert is fitted.

Re: Help needed on rear sight adjustment

Posted: Tue Aug 10, 2021 4:13 pm
by Ditchblow
Thanks, I will check the foresight, but, it all seemed normal to me!

Re: Help needed on rear sight adjustment

Posted: Tue Aug 10, 2021 10:51 pm
by Rover
What is a sub-six hold? Scroll down to Gwhite's third entry for a picture. THIS is what you should be using.


http://targettalk.org/viewtopic.php?f=4 ... b+six+hold

Re: Help needed on rear sight adjustment

Posted: Wed Aug 11, 2021 2:54 am
by kevinweiho
Is the sliding mechanism smooth and locks back normally when tilt downwards or cocking the pistol? Has the pistol been broken-in with the new seals/spring(s), does the pistol group, or the shots that are shooting high scattered?

Re: Help needed on rear sight adjustment

Posted: Wed Aug 11, 2021 9:38 am
by Ditchblow
It all slides back and locks fine, but, it has just had a new spring and seals, so that may be a cause, but, surely it should not affect the sights so severely ?

Re: Help needed on rear sight adjustment

Posted: Wed Aug 11, 2021 10:44 am
by Rover
Are you now able to zero correctly while using the proper sub-six hold?

Re: Help needed on rear sight adjustment

Posted: Fri Aug 13, 2021 2:55 am
by kevinweiho
Did the pistol have this problem before you had the full service done?

Is the front sight blade insert standard or the tall version?

Re: Help needed on rear sight adjustment

Posted: Fri Aug 13, 2021 9:09 am
by Rover
Since we're talking about front sights: I recently picked up a 120 year old Mauser 88 cavalry carbine cheap at a garage sale. It was such a light, handy little thing, I thought I'd take it hunting in the mountainous, heavily wooded area I live in.

I took it to the range to check the zero with the ammo that came with it and found it was shooting about a foot high at fifty yards. Then I started with various hand loads (another story), but no luck. Then I thought I'd mess with the sights, as I have with so many of my other guns. About this time, I though I'd check its value on line: $900. No way I'm hacking on a collector's item.

Well then, I'll just make something to raise the front sight without doing something that could not be reversed. I started rooting around for my brass shim stock and realized it would be a real PIA to make something so small and precise. So I looked for something else. I came across a package of tie-wraps. Hmmm.

I snipped the tip off one. It was about the same size and shape as the inverted "V" front sight. A liberal douche (no, not a Democrat) of Super Glue and I was in business.

Back to the range with some assorted handloads: one inch high and laterally right on. What bliss!

Re: Help needed on rear sight adjustment

Posted: Sun Aug 15, 2021 12:45 pm
by Ditchblow
It was fine before the new spring and service, cause and effect probably!

Re: Help needed on rear sight adjustment

Posted: Sun Aug 15, 2021 6:26 pm
by kevinweiho
The break-in period with new seals and spring(s) should be around 50-100 shots, if it continues to shoot high, you can use a tall front blade insert to lower the muzzle.

As long as the pistol groups well, learn how to shoot with the sub-six hold.

Re: Help needed on rear sight adjustment

Posted: Fri Aug 20, 2021 5:23 am
by Ditchblow
Thanks for that help, I have now taken the pistol back to the gunshop and had the rear sight re-set and it now has full adjustment. I a, also using the lower sighting method which works well. Many thanks for all the advice, much appreciated. Chris