I have 124gr Gold Dots. No +P since my only 9mm is a Browning HP. I don't use +P in my 45s either. I'd love to find some 115gr Winchester Silver Tips.
I seriously doubt +P ammo will hurt your HiPower
I shot quite a bit of the Corbin +P+ 115 gr stuff in the one I owned for several years. It showed no adverse effects.
Personally, I was never impressed with the 115 gr Silvertip ammo. Shot several varmints of various sizes with it over the years.
The Speer Gold Dot +P ammo, has been quite impressive though, in my experience With varmints and one very old and sick cow I had to put down at the Ranch.