Factory +P isn't an issue in any modern service pistol. A pocket 9 like the Rorbaugh not so much, they are tiny and are not designed for +P use. An XDm dwarfs a Rorbaugh, and is made for whatever reasonably well-made cartridge you can put in it. And for most pistols, the difference between +P and standard pressure isn't really a big deal at all. You're still only talking about a 115, 124, or 147 grain bullet atrelatively low speed. Another 50-100 feet per second isn't going to have a noticeable impact on a quality service oriented pistol.