I carry 124 grain in my 9mm guns, both revolver and semi-auto. I prefer the Speer Gold Dot 124 grain Short Barrel +P; it has a great track record, particularly with NYPD. While the 115 grain bullets can be driven to higher velocities with the same pressure, I've found that the extra muzzle blast is not worth the effort. I don't have any problem controlling the recoil from either a 3 inch barrel auto or a 2 inch barrel revolver with either a 115+P or 124+P round. I've never used 147 grain in any gun, so I can't offer an opinion on it, except that most LE agencies that carried the 147 grain 9mm either converted to another caliber, often the .40 S&W, or to another loading like the 124 grain GD.