I also have a 52-2, have had it a few months now but only shot it four or five times. In my hands it was not consistent. I remembered someone saying that the pistol takes some getting use to and a change in the standard way you'd shoot a pistol. i can't remember why.
Darn if I can recall what was said but someone on this forum will know.
They do make pretty round holes don't they.
I took my original wood stocks (too sharp and perfect to shoot) and replaced with Pachmayr rubber stocks. I get a good tight grip with them.
I'll stay tuned and hope for an answer.
ps: a little update on earlier threads about this gun...the seller came back to the store with the original box which is nice.