I struggle with the same problem, generally starting off with hitting POA, then drifting low and left as I anticipate recoil. I only have this issue with my auto, though. With either my .22 or .357 wheel guns, I consistently hit nice groups close to POA.
If I then switch back to the auto and take my time, I can make 2" groups out to 10 yards or so.
So I think in my case, its a purely mental hurdle. I end up rushing the shots, and because I have so many more shots in the magazine, I end up throwing a lot of them away. And subconsciously, I believe the auto shoots differently than the revolver, and I end up trying to "manage" the recoil before the trigger is pulled, to get the followthrough done and back on the front sight too quickly.
So my solution is to take your time, acquire sight picture, and squeeze deliberately.
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