I think I asked some of those questions too for my PT111. The answer, was just what the manual says. Any sammi spec +P, that does not exceed the 1225 fps is good to use. Of course, I heard also, not good to make that the steady diet.Justus said:Does anyone here use 9mm +P?
The Taurus website says it's OK but the manual warns against damage.
I purchased some +P awhile back (HST 124 gr, 1200 fps) for self defense use.
The manual does give a 1225 fps max.