Adjusting 1911 to shoot to point of aim

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vtuck2

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Guys,

I hope this is the right forum for this question.

Years ago, I bought a couple of IAI 1911 pistols. I picked one at random and stashed the other one away.

I shot my second CHL re-qualification with it. I shot the high score with it. At the end of 50 rounds there was daylight where the black used to be.

I fell upon hard times and sold it. I didn't cry too hard because I had the other one.

However, to my dismay, I discovered it was not remotely as accurate as the first one. It's ok for windage. But as to elevation it shoots horrendously - I mean HORRIBLY low. And the trigger sucks. But that's another complaint.

At 21' it's probably 18" low. Shoot the silhouette target center of mass - hit it in the belly button. Aim for the head and hit low center mass.

I haven't fired the gun much because it's so depressing. It has a fixed rear sight.

Could it be that a taller rear sight would get me where I need to be? Is there some other dire, sinister, unfixable explanation of the problem? If I can get it to shoot to point of aim I'd be willing to pay for some trigger work. The gun otherwise seems "reliable" and normal in that it's never jammed or failed to feed. But, as I said, I've fired it but little and the trigger is awful.

Never sell a gun you love.

Thanks,

Vernon
 
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You have that wrong.

It's already shooting way low.
A taller front sight would make it shoot way lower still.

I really don't have an answer though.
18" low at 7 yards is an awful lot.

It would seem there are some issues with barrel & slide fitting, but most generally, that causes a shooting high problem.

Have you tried shooting the gun off sandbags to make sure it isn't you pulling shots low?

What ammo & bullet weight are you using.
I think it is sighted in with 230 grain FMJ hardball.
Lighter & faster loads will shoot low.
But not that low.

rc
 
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Sight Adjustment:

-Move the rear sight in the direction you want your shots to go.

-Move the front sight in the opposite direction you want your shots to go.
 
Unless they're night sights, I don't see why you can't just trim the front sight.

Regarding the trigger, fortunately it's a 1911. You can get replacement triggers for it that probably give you a better trigger pull then your last.

My experience is that it's better to swap trigger before sights. Not as a process of elimination but because your shot placement may change a little with a better trigger pull and it's best to refit sights to your shot placement with your final trigger pull then to go the other way around.
 
sights

for elevation you take the amount of error=18in
tinmes the sight radius(my 1911is 6.5 in)+6.5
and divide by the distance in inches(21Ft)=252 in
you need to lower your front sight by.464 inches

be sure to shoot it off a sandbag to get accurate readings in inches
 
Lower the front sight half an inch? Good Lord, I don't think that they stick up that far in the first place, do they? I don't have my 1911 with me right now to measure, but that doesn't seem right.
 
It's right, but that is what I was saying in post #3.

18" at 7 yards is more front sight then you have to file off, unless it is a mighty strange 1911.

See post #3 again for suggestions.
Without knowing more and seeing the gun, I don't have any better answers.

rc
 
Guys,

Thanks for your replies.

First, I'm estimating the distance. But I originally said (or at least I THINK I did) 18" at 21 feet. I'm pretty sure the distance was 21' but it might not have been shooting as much as 18" low.

I'm a fairly accomplished and relaxed shooter so I don't think it's me. Nevertheless, your points are well taken and I will try tomorrow from a steady rest at a known distance.

I particularly appreciate the formula one of you gave to calculate this. I will try to quantify the distance and spread tomorrow and report back. It would be a fairly simple matter to replace the rear sight with a taller one. However the front sight is barely a nubbin as it is. So shortening it is not really an option. Or at least I don't think it is.

Thanks,

VT
 
18 inches low? Forsooth! This ain't a sight problem.

Check to see if somebody installed a long link in the misguided attempt to tighten the barrel's vertical engagement...or the "lockup" as it's often mistakenly referred to. That sometimes tilts the barrel radically at the rear, and down at the front.

With the slidestop pin through the link, swing the link to the in-battery position. The lower barrel lug should sit on the pin. If the link is holding the lug off the pin...that's probably whence the bug nests.
 
I just read your post I am trying to visualize what you are saying maybe I am too dumb to understand it. Would you if you don't mind explain it another way?
 
What ammo are you using? If handloads, you might want to cut down a bit, as a higher velocity bullet will exit the barrel faster and the gun will shoot low.

Jim
 
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