The main reason you don't see much in the way of 147gr +P is that the 9mm cartridge is already pretty short. For its size it's highly efficient, but there isn't much spare room inside to add more powder. The 147gr bullet is a tad longer than the lighter loads, and has to be seated a bit more deeply in order to keep the overall cartridge length within spec. As others have mentioned, there are already several excellent offerings in standard pressure at this weight, the Ranger T, Gold Dot and Golden Saber being among the best. Pick one of these and save both you and your pistol from the extra battering of the +P and +P+ blasters.