+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
$200+
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.
9mm IS the caliber. If you mean what is it equivalent to, it is approximately the same as a .38.