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morini short axis displaced

Posted: Mon May 16, 2005 12:05 pm
by Nano
To the forum:

In my city (La Paz - Bolivia), we have about 4 Morini Air Pistol. We are 20 shooter at all.
2 morinis are short version, these two pistols have the same problem, the pellets go at the left side of the targets, the shooters make the correspondent click (at the right) on rear sight, but the rear sight go to the top, dont move more and the shooter need tree or more clicks.

One shooter, make a new front sight, displaced of the axis of the barrel to the left (looks strange), but the problem will be solutioned.

The other shooter are waiting for a best solution.

Maybe the grip should be modified?
some other suggestion?

Thank you,


Nano

Posted: Mon May 16, 2005 3:27 pm
by Mark Briggs
Nano,

Sights on the Morini 162 have lots of left-right windage adjustment so I find it difficult to imagine that normal shooters have run out of adjustment on the rear sight. I had a 162 Long and currently shoot a 162 Short. Both of these pistols required me to apply a considerable amount of grip filler to make them work for me. The pistol naturally pointed to the left of target. But filling in at the base of my hand (the thick part closest to the wrist) I was able to bring the sights into perfect alignment with my natural pointing angle. My rear sight is adjusted so it is almost perfectly in the middle of its left-right range of movement. Even when the grip did not fit properly I could "muscle" the pistol to the right position and make the sights line up and the shots hit the centre of the target. Making the grip fit only reduced the number of fliers that went off to the left side of the target.

One thing for you to look for is the compensator may not be properly installed. If it is installed at a rotational angle (ie the front sight not perfectly vertical when the sides of the pistol's frame are vertical) then you will see some horizontal aiming error. Other than this I can't see any mechanical reason why you shouldn't be able to get the pistols to shoot in the centre of the target unless they've been heavily damaged in shipping.

Also - check to make sure the shooters are using the correct sight adjustment screw. The one that changes left-right sight position is located on the LEFT side of the pistol, the same side as the cocking lever. It is marked with the letter "L" and an arrow --> indicating which way to turn the screw to move the rear sight to the left. The adjustment screw located on the right side of the rear sight is used to adjust the width of the rear sight notch opening. It is marked with the letter "C" and an arrow -->. Turning the screw in the direction of the arrow Closes the rear sight, making it narrow and leaving less visible gap on either side of the front sight when you are sighting on a target.

Posted: Mon May 16, 2005 5:03 pm
by David Levene
I had a similar problem when I first got my 162EI Long.

It was caused by the rear sight gap being set extremely wide. When you alter the width you are actually only moving the right hand blade. If it is too wide then it stops the rear sight being adjusted all of the way to the right, leaving the shots on the left.

Try making the rear sight gap smaller and see if that gives you more windage adjustment.

morini axis

Posted: Tue May 17, 2005 10:46 am
by Nano
Thank you for their answers to Mark and David :

the movement of the adjustment screws was made correctly, but of its answers I can see that the problem is in the grip, in both cases the grip was reduced removing wood, it was not increased using puty, I will see that topic well and I go to post the results.

Thank you again,


Nano

Posted: Wed May 18, 2005 8:20 am
by Mark Briggs
Just a quick note to shed a little more light on David's previous comment regarding the rear sight width adjustment on the CM162.

After reading David's post I started to play with the rear sight width on my own 162. Sure enough, I discovered that I had 14 more clicks available to me to open up the rear sight, and as I dialled in these 14 clicks it was only the right half of the sight which moved.

But then I returned the sight to its original setting, and began closing the rear notch. From my normal setting I had 30 clicks of closure available to me. As I closed the rear sight I noticed that BOTH rear sight halves moved, not just the right side.

So it appears that, up to a certain point, both rear sight halves move. Then it seems the left sight half hits a stop and further adjustment results in only the right sight half moving. This is information of critical importance because I was under the impression (having witnessed previously both sight halves moving when I adjusted the sight width) that point of impact would not change with a change in sight width. Now I realize this is only partially true. So if we ajust sight width during a match we'd better be prepared for a change in point of impact!

Hmmmm, we learn something every day... ;-)

Posted: Wed May 18, 2005 9:18 am
by David Levene
Mark, that is extremely interesting. As someone who no longer shhots as much as he should, with middle-aged eyesight, I have always needed a wide notch on my 162. I have not therefore noticed what happens at narrower widths.

I am in th US at the moment but will have a look on my return to the UK. If I can remove any stop on the left hand blade it would allow me to use a wider notch and not have to "aim off".

Posted: Fri May 20, 2005 2:05 pm
by PaulT
Noticed the same on the 84e. As light sometimes changes a lot during a match, it is handy to know windage movement required to a change in the rear blade width. Data best collected in training!