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307 Posts
I've always understood the P was for pressure, not police, but that's really neither here nor there.
+P loads have a SAAMI specification to meet. SAAMI does not have a specification for +P+ and that's why manufacturer warrants their products for +P+. A +P 9mm load would max out a 38.5k psi, antthing over that would probably be a +P+. It could ALSO be a 25,000psi load and still be labelled as +P+ since there is no SAAMI spec for +P+.
+P loads have a SAAMI specification to meet. SAAMI does not have a specification for +P+ and that's why manufacturer warrants their products for +P+. A +P 9mm load would max out a 38.5k psi, antthing over that would probably be a +P+. It could ALSO be a 25,000psi load and still be labelled as +P+ since there is no SAAMI spec for +P+.