+P Ammunition Use
Unless the firearm is explicitly marked as being +P rated or it is clearly stated in the gun's manual, +P ammunition should not be used. If in doubt, a check by a gunsmith or contacting the gun's manufacturer will verify the safety of +P ammunition in a particular firearm. Ammunition that is loaded to +P pressures is clearly marked on the headstamp as such, for example a 9mm would be marked "9mm Luger +P".
The use of +P or +P+ ammunition does accelerate wear and reduces the service life on the component parts on any pistol.
In addition to questions of safety and durability are issues of reliability and usability. Since +P cartridges may generate a significantly different quality of recoil, this can affect firearm function. For example, recoil operated firearms may fail to function if the velocity of the recoiling parts is too high; in lightweight revolvers, the cartridge case may recoil away from the bullet with sufficient force to overcome the crimp, allowing the bullet to move forward in the cylinder and causing the cylinder to bind. The increased velocities and pressures of a +P loading will increase muzzle blast and recoil, and may prove difficult to handle for many shooters; these problems are exacerbated by compact, lightweight guns with short barrels.
Read more about this topic: Overpressure Ammunition