+P means the cartridge has been loaded to higher pressures than a standard load. This will normally produce higher velocities as well.
Winchester
None. Actually, if you mean "+P" the plus P indicates more powder in the casing, therefore more velocity and more muzzle energy.
The "P" as in +P or +P+ indicates a higher velocity load. Not all guns can handle this.
It depends on what cartridges you are comparing. Some 9mm is. Also, 9mm is also availabe in Plus P.
9 x 19 is the same as "9mm Lugar" +P means the load will reach higher pressures and veloxcity than a standard load.
Yes it does. The M&P is a fine weapon.
Yes
The 9mm Parabellum cartridge made by the Reminton-Peters cartridge company.
yes
There have been several, and include the P-08 Luger, the P-38, and Mauser pistols. The proper term for this cartridge is the 9mm Parabellum.
$200+
9mm IS the caliber. If you mean what is it equivalent to, it is approximately the same as a .38.