I occasionally carry 9mm Hi-power. When I first started carrying a Mk II about 40 years ago I was always told to use only non +P ammo. Later when I got a MK III I continued to use non +P ammo. While I don’t shoot these pistols often I do shoot about 500 rounds of my carry ammo through them.
I was told recently that I can use +p ammo through these pistols while others told me I can use +p only in the MK III.
So what’s the real deal on use of +p ammo use in Hi-Power pistols?