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View Full Version : Why am I shooting low? (Glock 19, Trijicon Night Sights)


NeenachGuy
02-24-2012, 8:17 PM
Went to the range today with the Glock 19. I'm shooting low, and I just can't seem to figure out what's happening.

The target below was 20rds. of 115gr. FMJ Winchester White Box (WWB). There's two shots on there that are low and to the left which I'm not concerned about. I know what I did there. I'm more concerned about the fact that I was aiming 2 inches higher than where the bullets hit the target, at least that's what I think I am doing. I was only 12 yards away from the target, and I was practicing a Weaver position. What do I need to adjust or work on to get more of the rounds in the little orange circle?

http://img52.imageshack.us/img52/3458/target1n.jpg (http://imageshack.us/photo/my-images/52/target1n.jpg/)

Uploaded with ImageShack.us (http://imageshack.us)

Below is an edited target image that shows generally what my sight picture looked like (approximately) from this distance from the target. This is the first gun I've used with these Trijicon sights -- is this the correct alignment?

http://img864.imageshack.us/img864/552/target2.jpg (http://imageshack.us/photo/my-images/864/target2.jpg/)

Uploaded with ImageShack.us (http://imageshack.us)

Any comments/suggestions appreciated.

badduggy
02-24-2012, 9:05 PM
where was your point of aim, what kind of sights are you using?

sawchain
02-24-2012, 9:14 PM
Below is an edited target image that shows generally what my sight picture looked like (approximately) from this distance from the target. This is the first gun I've used with these Trijicon sights -- is this the correct alignment?

Actually, IMO, you're aiming high. I line the three dots up and place the bullseye so it's sitting right on top of the front sight post. For the target you pictured, I would bisect the target partially. Your front sight post shouldn't cover your intended point of impact. This is exactly how I shoot my XD and it's deadly accurate.

Unfortunately, that means your sights might be farther off than you already think.

Who did the installation? How did you select that particular model of sight?

NeenachGuy
02-24-2012, 9:15 PM
where was your point of aim, what kind of sights are you using?

I drew a picture showing what the sight picture was looking like (see original post), which should show what I'm aiming at. Also, I'm using the Trijicon Bright & Tough night sights.

NeenachGuy
02-24-2012, 9:19 PM
Actually, IMO, you're aiming high. I line the three dots up and place the bullseye so it's sitting right on top of the front sight post. For the target you pictured, I would bisect the target partially. Your front sight post shouldn't cover your intended point of impact. This is exactly how I shoot my XD and it's deadly accurate.

Unfortunately, that means your sights might be farther off than you already think.

Who did the installation? How did you select that particular model of sight?
That's how I was originally shooting, but I adjusted where I was aiming after noticing that the impact was low. :hide:

The installation was done by a Glock Armorer at the shop where I bought the gun; I just walked into the shop and said, "I want night sights on my Glock," and they selected the model and the armorer put them on. If it turns out I got screwed with the wrong sights being installed, I'll be pissed off, but I know it's my own fault for not verifying everything first. I'm not sure what the markings on the sights mean... is there a way for me to verify whether he installed the correct height? I don't have the packaging the sights came in or anything like that.

vintagearms
02-24-2012, 9:24 PM
There are only two ways of sighting in- POA/POI and 6'o clock hold. measure your front post. For POA//POI it should be .245 and 6'oc clock hold should be .215.

huckberry668
02-24-2012, 11:14 PM
Don't jump to conclusions yet. Sounds like you were shooting 'off hand'. Bench the gun on sandbags and shoot it with the same POA and see where the POI is. It could be ammo, sights or you.

tbc
02-24-2012, 11:47 PM
How did you align your sights? Did you align them using the dots or using the top edge of the iron?

9mmepiphany
02-25-2012, 1:25 AM
The first thing you should do is determine if it is you or the sights. Shoot the gun off a bench/rest to check zero. It also wouldn't hurt to have someone else shoot the gun to see if it shoots the same for them.

If it isn't the sights, my first guess would be that you are tightening the grip of your fingers as you're pressing the trigger. The other thought is that you are pulling down with your support hand...the Weaver has a tendency toward that also

rkt88edmo
02-25-2012, 1:43 AM
How did you align your sights? Did you align them using the dots or using the top edge of the iron?

This, many three dots do not have the top planes level when you line up the sights.

Also - 12 yards isn't super close, but your sights may be on at 25, not sure what the dif would be, but could be enough.

jdewolf
02-25-2012, 6:08 AM
I'd try some different ammo and see if it shoots the same. Long story short is I was putting rounds about 3" low @10y with Federal 9mm. I usually shoot it because it's easy to get [Walmart] and I've never shot that low before. Bought some range reloads and suddenly it was shooting nice and flat [no drop]. Granted it could be the human factor or your sights as well. Just something to consider.

Darklyte27
02-25-2012, 6:13 AM
probably because the ammo /gun is made to shoot at x range. remember pistols are not long range guns. Remember the rifle bullet trajectory? it rises up to a distance then falls. so maybe your round/sights/gun is meant to be shot at 15 yards? etc.

HighLander51
02-25-2012, 6:55 AM
[QUOTE=NeenachGuy;8103015]Went to the range today with the Glock 19. I'm shooting low, and I just can't seem to figure out what's happening.

And what do you think is wrong with that group for a G19 with night sights and factory trigger? Assuming you shot two mags in short order. Try it at 25 yards for the 115s, also try 147gr bullets, they should be about 1" high at 12 yards.

NeenachGuy
02-25-2012, 9:47 AM
There are only two ways of sighting in- POA/POI and 6'o clock hold. measure your front post. For POA//POI it should be .245 and 6'oc clock hold should be .215.

There are only two ways of sighting in- POA/POI and 6'o clock hold. measure your front post. For POA//POI it should be .245 and 6'oc clock hold should be .215.

Please don't laugh at me, but I don't have a micrometer or caliper to measure the front post, so I used some coins (see below). Based on the information in the Wikipedia, a U.S. Quarter has the thickness of 0.069" and a U.S. Nickel has the thickness of 0.077", so two quarters and a nickel would give me 0.215" -- right?

If this is valid, then why is my front post lower than 0.215"? And wouldn't a taller front post cause my POI to go even lower than it is now?

http://img254.imageshack.us/img254/7733/frontsight.jpg (http://imageshack.us/photo/my-images/254/frontsight.jpg/)

The first thing you should do is determine if it is you or the sights. Shoot the gun off a bench/rest to check zero. It also wouldn't hurt to have someone else shoot the gun to see if it shoots the same for them.

If it isn't the sights, my first guess would be that you are tightening the grip of your fingers as you're pressing the trigger. The other thought is that you are pulling down with your support hand...the Weaver has a tendency toward that also

I'll set up some sandbags and get to work ASAP. This is a great suggestion; thanks! I'll try to pay attention as to the support hand issue as well; I hadn't heard about this before.

How did you align your sights? Did you align them using the dots or using the top edge of the iron?

TBH, I don't remember. I was focused on the dots, so that's what I remember...

I'd try some different ammo and see if it shoots the same. Long story short is I was putting rounds about 3" low @10y with Federal 9mm. I usually shoot it because it's easy to get [Walmart] and I've never shot that low before. Bought some range reloads and suddenly it was shooting nice and flat [no drop]. Granted it could be the human factor or your sights as well. Just something to consider.

Thanks. This is a great point. Will try different ammo after I verify my technique and the gun.

And what do you think is wrong with that group for a G19 with night sights and factory trigger? Assuming you shot two mags in short order.

Just trying to figure out why the orange dot is so hard for me to hit. :confused:

Oceanbob
02-25-2012, 10:00 AM
Get a slightly higher rear site.

Looking at that group, I really wouldn't worry about it. :cool2:

You have good trigger control and the group is very consistent.

S dot
02-25-2012, 10:08 AM
have you tried 147gr?

JNunez23
02-25-2012, 10:12 AM
Wow, it look's like you're shooting high, but you are striking low. Probably the sights.

GM_77
02-25-2012, 10:46 AM
Went to the range today with the Glock 19. I'm shooting low, and I just can't seem to figure out what's happening.

The target below was 20rds. of 115gr. FMJ Winchester White Box (WWB). There's two shots on there that are low and to the left which I'm not concerned about. I know what I did there. I'm more concerned about the fact that I was aiming 2 inches higher than where the bullets hit the target, at least that's what I think I am doing. I was only 12 yards away from the target, and I was practicing a Weaver position. What do I need to adjust or work on to get more of the rounds in the little orange circle?

http://img52.imageshack.us/img52/3458/target1n.jpg (http://imageshack.us/photo/my-images/52/target1n.jpg/)

Uploaded with ImageShack.us (http://imageshack.us)

Below is an edited target image that shows generally what my sight picture looked like (approximately) from this distance from the target. This is the first gun I've used with these Trijicon sights -- is this the correct alignment?

http://img864.imageshack.us/img864/552/target2.jpg (http://imageshack.us/photo/my-images/864/target2.jpg/)

Uploaded with ImageShack.us (http://imageshack.us)

Any comments/suggestions appreciated.


Don't know if this will help but this is a reply from the vendor when I sent them a question I had.


The HD Sight line is designed to facilitate a “Combat” Zero @25 yards (Cover your POI) The Front sight Height Measures .215” and the Rear sight Height from top of sight to top of slide is .231” Hope this helps. Thank you for your interest in Trijicon products. Have a good day.

Sincerely



For what it is worth my G19 shoots high and I need to do a 6 o'clock hold at 25 yards with the new Trijicon HD NS to hit X ring. Out of the box it also shot high so there are variations in the G19's themselves so I would take into account what the vendor says and that there are variations in glocks.

Lugiahua
02-25-2012, 10:53 AM
This is exactly how I shoot my XD and it's deadly accurate.

Unfortunately, that means your sights might be farther off than you already think.

Who did the installation? How did you select that particular model of sight?

Interesting...that means your XD is zeroed as six o'clock sight, while mine is 12 o'clock.

at 15 yards range, I have to cover the target with my sight.

tbc
02-25-2012, 12:04 PM
Based on your vendor's reply, you should use #3. It will get your grouping on the orange.
http://img.tapatalk.com/48436553-3e92-76f3.jpg