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-   -   Glock 17 (http://www.firearmstalk.com/forums/f14/glock-17-a-76597/)

biggun 11-18-2012 12:07 AM

Glock 17
 
My glock is shooting about 4'' to high do I need to get a taller front sight if so what size shoult I get

SSGN_Doc 11-18-2012 12:11 AM

What kind of sights? What ammo? What distance? What sight picture are you using (6 o'clock hold or dead center)?

biggun 11-18-2012 01:09 AM

Glock 17
 
I am useing xtp bullets at about 25 yards and I have ajustable sights on the back I have set them low as they will go

SSGN_Doc 11-18-2012 01:31 AM

Factory loads?

It sounds like you may indeed need a taller sight if that is the case. Also most Glocks need a 6 o'clock hold on the black of a 25 yd bullseye to hit center at 25 yds.

biggun 11-18-2012 02:06 AM

Glock 17
 
How much higher would go on the front sight , I am pointing at the center

KG7IL 11-18-2012 03:48 AM

1 Attachment(s)
I stole a couple of numbers from http://www.gunrightsmedia.com/showthread.php?408305-Glock-19-17-34-Sight-Radius-effects

If your sight radius is 6.5" and you are shooting 4" high at 25 yards, then.

h= required increase in heigth.

25 yards is 12 inches/foot & 75 feet or 900 inches

Now we are happy 'cause everything is inches, and lord knows we don't live in a foreign country.

So from the diagram below we get h= (6.5" * 4")/900
.028888 isn't much, call it 3 hundreths or less than 1/32" increase in heigth.

HOSSFLY 11-18-2012 03:47 PM

Quote:

Originally Posted by biggun (Post 1018395)
How much higher would go on the front sight , I am pointing at the center

Try a 6 o'clock hold-

KG7IL 11-18-2012 05:17 PM

Quote:

Originally Posted by HOSSFLY (Post 1018855)
Try a 6 o'clock hold-

Works fine for standar bull targets, not so good for shooting shotshell husk or charcoal briquettes. or a turkey head.

I'm all for the POA/POI at 25, then applying kentucky windage from that point.

But, after the math says t's less than 1/32 of an inch, I would "hold low" also, I am not so sure that he would want to go through replacing, testing, filling, testing, filing, testing, and finishg, for 1/32"

Dragonheart 11-19-2012 10:04 PM

I would suggest trying different ammo to see if it will get you closer to your point of aim. About the best group I have ever gotten out of a G-17 at 25 yards is 2-1/2" out of a machine rest, so you might not be too far off. If you are going to fool with the sights I would suggest picking up an adjustable set of Glock sights off EBay. You can usually find some new takeoffs for around $20. Changing out the fixed sights with adjustable will most definitely solve your problem.

danf_fl 11-19-2012 11:40 PM

Lighter bullets will impact lower than heavier ones.


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