Ak is a short distance man stopper , that is not a bad group for a quick engagement at 100 yards.
Just the difference in ammo can give you a few inch spread.
I did notice you did not tend to rise with each shot , that is common with AK's in a fast engagement.
I enjoy shooting the Ak and have a few different ones, I have also been shot at by them.
This one get messed with a lot different reflex sights , then back to iron just fun to shoot out back