Mine is a 550 FS also. I am a very big guy and the only rifle I ever shot that really bothered me was a .458 Lott and the scope whacked me above the eye. My 9.3 does not bother me a bit. Like CKW said, I think the hogback stock helps with the recoil. The pad on mine is very soft. I could shoot it all day even all hunkered over a bench. I shoot the PRVI 285 gr. factory loads a lot and they are very accurate. They kill big stuff dead too! Plus they are much cheaper than the Norma stuff. My barrel must be slow because I only get about 2,200 fps from these loads. Haven't chronograped my handloads. I think the barrel is only 21" or so as I recall. It has become one of my "go to" rifles.
If the stock is too long, I would suggest getting it cut off and putting a good soft, quality pad on it and I think you will be fine. Hope this helps.
