denfoote, yes you can shoot +p's in your P-5 it was designed for nato ammo which is +P. I put 8lb wolf springs in my P-5 and have shot Winchester 127 +P+ without any problems. I shoot the 147 Talon rounds in all my guns now, I like the deeper penetration and the Walther eats the 147 up just fine, no problems at all. I have a very good P-5 it shoot point of aim without any problems with any ammo I use.