Some people will say that standard pressure 9mm is all you need. They will say that the extra blast and recoil is not worth the gain in velocity. They will say it is more expensive (bulls**t),and that unless your pistol says explicitly that it is made for +P or +P+ it should never be fired with that ammunition.
I say any 9mm made after World War II should be good to go, or isn't worth owning unless it is a micro 9mm like the Rorbaugh, and that a gun as high-quality as a Sig P6/P225 is absolutely fine with the slightly warmer 9mm+P loads. Besides, Europeans load their 9mm to a different standard that is at least equal to our +P+. I know +P+ doesn't have any set guidelines, but really if it is loaded by any reputable manufacturer it will be at or slightly below the CIP spec of 39,200 PSI.
Basically americans load 9mm lighter than everyone else, and lawyers have gotten their hands into everything. Dudes trying to make a 147 grain go 1400 feet per second out of a 4" barrel probably fueled that fire.
If it is a factory load, I wouldn't be the slightest bit concerned, those people have a business to run, and usually businesses don'tlike causing their customers injuries or damage to property.