Apolagies for any confusion .. well yes, ''corkscrewing'' - a suitable description.
I have always found the 9mm in particular to exhibit this, even in larger frame autos, like my BHP. As the barrel axis is always above the grip and so one's hand ... the gun's reaction to bullet passage and spin application, is to want to rotate in the opposite direction. Of course all guns show this to some degree but in many cases it is minor and ignored for the most part. I just find the 9mm a little more apparent with this.
The upward movement of the muzzle is the major component under recoil ... maybe so much so that torque is still hardly noticed. Probably I have been more aware of 'torquing'' since shooting years ago with a diminutive .32acp Browning ... tiny gun ... and boy, did it want to twist!
I daresay - the grip we mostly use on the R9 - being necessarily a robust hold .... pretty much controls the effect. It is not a problem per se but - a (to me) identifiable component of the whole recoil cycle. Aim recovery is mostly getting the muzzle back down but I certainly am aware that there is some correction also for the rotation effect ... even tho small.
Does this clarify at all? ... or does my verbosity further confuse??