I've shot HST 147gr +P in my subcompact. Went just fine. BTW, I can't imagine you not being very pleased with the trigger.
Just my opinion but forget the +P or +P+ stuff.. IF you hit your target with normal HP ammo it will do the job, if you miss it doesn't matter what you are shooting.
+P+, RIP, Zombie ammo are all a ploy to get a few extra $$$ out of your pocket. [FONT=&][/FONT]
But out of a compact/subcompact pistol, you can see decent gains in lb ft of energy delivered on target. Of course, as you said, you have to HIT your target.
The gains of +p out of a subcompact may not be worth the extra recoil and noise, however.
Modern JHP technology with standard pressure ammunition has really evened out the playing field over the +p stuff - which was a way to compensate for older bullet technology.