Ameriglo Spaulding sights shooting high

[octagon]

Long version below but short version is I am shooting groups about 5" higher than aiming point after installing Ameriglo Spaulding sights on newer Gen 4 Glock 19 using CCI Brass ammo. Similar height of group at 7,20 and 25 yards. Using 6 o clock hold. Sights were slightly left stock but height of groups good with OEM Glock plastic sights before swap. Thoughts?






I just installed a set of Ameriglo Spaulding sights with yellow square front sight and plain black serrated rear sight. The sights were new in the package and marked for Glocks. I removed the stock plastic sights and installed the Spauldings with no issue. Dry fired a few days before getting to the range today.

I started zeroing at 7 yards on 3X5 with a dot on it. First group was high and left. I adjusted the rear a little to the right and shot another 5 shot group.

Second group was about the same distance to the right this time and still high. I fired another to confirm and still high and to the right. Small adjustment back left and fired another 5 at 7yards. The group was centered and yet still high. I measured each group and all were around 4-5" high. Group sizes range from 2 7/8" and under with several having 1 elongated hole of 3 shots and 2 close.

I moved to 25 yards on the rifle range to start getting 25 yard data and verify the high group or not.

5 at 25 yards using 6 o clock hold and the rifle benches I got 2 groups just over 3" but still around 5" high.

I tried standing and the group was a pinch lower but still at least 3 1/2" high.

I was getting BTF more frequently and so I installed the Apex extractor and spring in the thread as I have already have the correct ejector, new Gen 4 RSA and polished the top and bottom of the original extractor. This helped ejection be more positive but I did have an occasional BTF that may have been related to grip and positioning trying to get a good group and more POA POI.

I tried a 5 shot group at 25 Yards and it was still high.

I then tried 2 10 shot groups one standing and 1 supported at 20 yards with same results.

Just to check the ammo and me I switched to my Glock 22 with conversion barrel in 9mm and a Dr Red dot. I shot the last 5 rounds I had with me at 25 yards on a 3X5 with a dot on it. Using a straight on hold on the dot and benching it I got a 5 shot group of 3" with 3 touching and one just off that group and the 5th opening up to 3" overall basically on the dot. the three touching were less than an inch left and the 2 others were just right and right and slightly above the aiming dot on the card. Ammo seems fine and gun ran perfect other then BTF before Apex extractor install and 1 or 2 after.

[Redhat]

What ammo were you using?

Did you try a different brand or weight?

What part of the front sight were you using for your aiming point?

[peterb]

I had the same problem with the Spaulding sights on my gen4 G19, but it had also shot high with the stock sights. I had replaced the stock plastic rear with the next shortest Glock rear -- I think it was 6.4mm(stock) to 6.1mm. That got me close.

I just replaced the Spaulding rear with the shorter version -- I think it's .250 instead of .265. Only one short range trip but it seems to be close.

I mostly shoot Lawman 147 and 124 and Blazer Brass 124.

[octagon]

What ammo were you using? CCI Brass 115 gr

Did you try a different brand or weight? I don't have any other 9mm ammo

What part of the front sight were you using for your aiming point? I was using the top of the sight even with the top of the rear sight

I don't think it is ammo related as the same ammo shot POA POI on my Glock 22 with red dot and conversion barrel and in my Glock 23 with conversion barrel and the gun before the sight change also shot POA POI (well a little to the left but I never adjusted the stock sights) with the stock Glock sights. All the guns in all the configurations never shot high with any ammo in 40 or with 9mm conversion barrel with all kinds of ammo. I unfortunately ran out of all my surplus of various 9mm ammo before buying 2 cases of CCI brass I have had good luck with before.

[Redhat]

I don't think it is ammo related as the same ammo shot POA POI on my Glock 22 with red dot and conversion barrel and in my Glock 23 with conversion barrel and the gun before the sight change also shot POA POI (well a little to the left but I never adjusted the stock sights) with the stock Glock sights. All the guns in all the configurations never shot high with any ammo in 40 or with 9mm conversion barrel with all kinds of ammo. I unfortunately ran out of all my surplus of various 9mm ammo before buying 2 cases of CCI brass I have had good luck with before.

It might make a difference based on what those particular sights are regulated for. A call to Ameriglo might be helpful as well.

You might try covering the colored part of the front sight with tape or something else to see if that has any effect.
(Sorry...didn't see your answer on this above)

[Wondering Beard]

IIRC, Spaulding CAP sights are 'drive the dot' sights.

[Redhat]

IIRC, Spaulding CAP sights are 'drive the dot' sights.

I suspect you're right on that...else why have such a big dot. I also have a suspicion that with those type sights, it may cause the shooter to be subconsciously not as aware of where the top of the front sight is in relation to the rear, leading them to raise it up in the notch a bit.

[octagon]

Update:

I just got out my gun, sight tools,calipers and old sights from my Glock 23 that I had replaced with the HD sights. I pulled the rear sight (Spaulding) from the Gen 4 19 and measured it. It measures .26" at the high point from bottom of the dovetail to top of the sight on the edge right near the notch. The old Trijicon 3 dot night sights removed from my 23 measure .23" at the same point. I took several measurements to ensure it was repeatable and they all came back .26-.27 for the Spaulding rear and .23 each time for the Trijicon. I don't know if that is enough to be print 5" high at 25 yards but it would indicate higher hits with a taller rear correct?

The front sights appear to be the same height between the Spaulding and the Trijicon 3 dot night sight but I don't want to pull the Spaulding front if I can find a solution that keeps it for free. I will try and get out to shoot soon and see what the results are. I will take the sights (new and old as well as a brand new set of Meprolight and Trijicon 3 dot night sights I have and change sights at the range if need be.


ETA Glock uses different height rear sights to adjust a +0 is 6.5mm tall and a +1 is 6.9mm tall so it appears the mark on the front sight is just a nick or gate mark.
I'll post the results. Does anyone know how to determine if the stock Glock plastic sights are normal height or if they put different height plastic sights on from the factory how to tell which is what I had on mine stock? There are no letters or numbers on the sights but there is a nick,injection molding gate mark or possibly a "D" on the right side of the plastic front sight. Very tiny so even with reading glasses and a magnifying glass and a flashlight I can only guess it is a D if it isn't just a nick.

[octagon]

In looking for more info and checking with Ameriglo as Redhat suggested I found this page and sight height to hits calculator.

https://ameriglo.com/pages/sight-calculator

Plugging in my info it indicates I need a .033" shorter rear sight or the same amount taller front sight. The Trijicon is roughly that amount shorter so I hope that corrects things. I'll post my results.

[Edster]

The mark on the right side of the stock sight matters. This may help:

http://eu.glock.com/english/options_rearsight.htm