What kind of accuracy can I expect out of a pistol-style red dot on a 10/22?

With a 3MOA dot, I would “test” at 50yds with a target at least 3” in diameter. It is important to be able to center the scope dot inside the target so you can see an equal perimeter on all sides. The human eye is a precision optical instrument and is quite capable of this “centering” at that distance. Groups should be close to what could be expected using a low magnification scope.
 
You should at least be able to get accuracy equal to the size of the red dot. I.E. if the dot is 2 MOA then you should be able to shoot that. 1 MOA is approx. 1" at 100yds. 1/2" at 50, etc. My suggestion is use a target with same size circle for the yardage/MOA. so if your 2MOA red dot is shot at 50 yds. then your circle needs to be 1". That way the dot will completely cover the circle without over lap. If you're shooting a 2 MOA red dot at a 1 MOA target then depending on your hold you can already be 1 MOA off center. Shooting at least 3 MOA would be a function of the red dot/ target relationship and nothing to do with your shooting. Hope this helps.
 
I have a Burris Fast Fire 2 (2MOA dot) on a Ruger Takedown. With Velocitors or Yellow Jackets, I can shoot an inch at 50 metres. I am quite sure this rifle would shoot tighter groups with a different optic but I only use it for grouse and rabbits in the bush so most shots are within 10 metres.
 
Update. Finally got out to the range again this week. I build myself a rifle rest and sighted in at 50 yards. I was able to get a 3 MOA average group with Velocitors and a 2.5 MOA group with SSI SV. Was hoping for 2 MOA accuracy but likely could get better results if I tried different kinds of ammo. Thank you for all your input!
 
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