@rival C.a.r is great. It's really close range app but really can't wait to try it! It turns out I put the trijicon sights on and a gunsmith bore sighted it to zero. I took it to the range used a little canter like in car with a "Wallace" stance ( I think) tilled my head to the right and shoot righty over my left eye. At 20ft I put 15 rounds in a 4" group. I am happy. Maybe I was just the unlucky on and all my Glocks were never zero'd? Anyway they look pretty good in super low light too. Thanks so much for everyone help.
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If your sights weren't zeroed, you should have had tight patterns somewhere other than the bullseye. If your patterns were loose, you might have a glitch in your sight picture, grip, trigger pull, breathing, stance... Seems like something happens to just about everybody from time to time.
If you suspect the gun, see if you can have someone else shoot it. If their patterns match yours, the problem is the gun. If their patterns are a lot different, the problem is likely something you're doing.
I had a weird problem for awhile - my aimed patterns anywhere from about 15 feet to about 40 feet were nearly identical - I couldn't get a good grouping even up close. Then I switched from 9" black targets to 9" targets with a 1" black center. Suddenly, my groups up close tightened up while my distant groups stayed the same.
What was happening was I wasn't centering the front dot between the rear dots (3 dot night sights), I was trying to center the front post in the gap in the rear sight. At 15 feet, the black circle offered no contrast, so I was concentrating on a black post in a black gap against a black backdrop, and was effectively guessing when I was on target. Moving out, the target seemed to get smaller and smaller, giving me more and more white background for contrast.
Shooting into a white target, I was measuring the gaps between each side of the front sight and the rear sight and ensure they were equal. After I realized what I was doing, I started concentrating on the dots instead of the post and gap and my patterns started tightening up quite a bit. Just switching target styles helped me figure out what I was doing wrong.