Hey Everyone,

Quick question.  When I'm shooting at 100 yards.  I shoot 10 shots standing, kneeling and prone.  My kneeling shots are grouping but going right about 3-4 inches.  My offhand and prone are dead center (Especially prone).  I'm right handed/right eye dominant and wearing plates.  I'm taking my time and following through with my shot.  During follow through i see my sight (Aimpoint) go to the right.  The crazy thing is this just started happening (Last rifle qual with agency).

Thanks,

CB

Are you using a sling that might be slightly bending the barrel under tension?

Do you wear plates primarily for work? I see some guys that wear patrol uniform 99% of the time and then come out and qualify in a full plate carrier and shoot like shit. I agree with TonyF's statement. It's definitely possible that you are doing something along those lines. All it takes is some practice.

Your eye is in a different place when the group moves.  Different in relation to the optic (does the same for irons, or a scope and probably a red dot).

People who shoot competition at longer ranges can usually tell you that when the move from standing to sitting or sitting to prone, how many clicks up/down or left/right they have to adjust to keep their groups centered.

Consistency is key.  That's why nose to the charging handle is so important.  I set my scopes/red dots up so I keep my nose to the charging handle.  Means I sometimes have to buy a second scope mount when I buy a different scope, but it works for me.  If I shoot it with the scope on it, my nose is on charging handle.  If I take the scope off to use the back up sights, my nose is on the charging handle.

If it just started happening, check what has changed. Have you had an injury? Get glasses? New prescription? New equipment?

You were absolutely correct.  I changed from nose to charging handle to cheek on stock.  Why???  Because i heard that with red dots consistent cheek weld wasn't as important.  Wrong!!!!  Back to nose to Charging Handle and back to perfect scores.

Thanks,

Craig

You were absolutely correct.  I changed from nose to charging handle to cheek on stock.  Why???  Because i heard that with red dots consistent cheek weld wasn't as important.  Wrong!!!!  Back to nose to Charging Handle and back to perfect scores.

Thanks,

Craig

What red dot? They ALL have some degree of parallax, some more than others.
Eotechs have less than most.

Good read:
https://www.ar15.com/forums/ar-15/Red-Dot-Parallax-Test-Results/18-714950/

Aimpoint parallax is usually pretty great, wouldn't expect that big of a difference.

If your barrel isn't floated and you're holding sling tension this is definitely possible.