I would go with the bench rest first. Group is good and not very far off. Maybe one or two clicks to right depending on the distance you are shooting. I have a couple of stainless Target model Mk IIs. Those are click adjustable. I assume the 22/45 is the same. If you decide to move it and are unsure of the direction to turn the screw, counrt the clicks as you go. If it moves the wrong way, all you have to do is move the same number of clicks back to where you were and go the other way counting clicks till ya get there. Best to have it on a bench when ya do that.
One other option before ya move it is changing ammo brands. Some brands will shift point of impact (POI) and or elevation. One other problem with that is that the guns are sometimes picky about ammo brands. Some will feed weel with some and not be as accurate. Some will feed well and be accurate and some will be accurate ane feed like crap. Mine are that way. Ya just don't know till ya try it.
I have one fixed sight Mk II that will feed any kinda good or crap ammo you put in it. It's a 4" gun and is fairly accurate to very accurate with most brands. POI only moves a bit with most brands. The 2 target models are very picky about ammo and the standard is not.
I have gone through quite a few Mk is & IIs over the years and they all behave differently. Never had a Mk III or IV. Don't want those. Tried a few 22/45s. Have not owned one yet.