If you can afford enough to shoot hot ammo to make measurable discernable wear on your Smith auto, you can easily afford to buy two or three new pistols.
Ammo made and packaged in the US and distributed through commercial retail channels is safe to shoot in your modern firearms, whatever its markings and headstamps are. These days, +P and +P+ are marketing terms.
If you really want to sell a lot of ammo at top dollar, simply print "law enforcement only" on the packaging.