I have used Federal 9BP 115/124 gr hp for literally decades. It has always been accurate and reliable. Federal primers are the best on the market as far as I am concerned. My primary 9mm have been the BHP and a 940 as BUG or off duty. The so called "extra" you get from +P+ is probably illusiory as from a 2" (940) you have a short barrel and you do lose some velocity, don't care what anyone says. In the Browning it is a 1935 design (albeit a great one) and it is too dear to me to use ammo that is not even rated by any authority as to pressure. +P+ is not a recgonized rating of pressure, it is what ever the builder thinks it is, or how much powder they can cram into the small 9mm case. Further, the +P+ designation was developed for US gubbimint agencies who can afford (and do) replace weapons on a regular basis that private citizens cannot afford to do.
Having said that, I firmly believe the +P and +P+ have much less meaning in terms of more power than they did years ago (the first +P+ .38 Special 110 gr HP load was developed for the Treasury Department for Narcotics Enforcement and the Secret Service). Today +P means a lot less in terms of power, in .38 Special it might mean as much as an extra 100 FPS with the same bullet, the same holds true for 9mm. The +P+ loads? You just do not know what you are getting. I am fairly certain that a major ammo builder is not souping up dangerous pressures, but the boutique ammo guys? Who knows.