If you have a modern quality semi auto gun +p and +p+ are fine to shoot in it. It will put more wear on the gun but not to the point where you'll notice it in 6mo or even years, unless youre shooting tens of thousands of rounds a year.

Glocks
HKs
Walther P99/PPQ
S&W M&P and steel autos
Sig
New Hi Powers
Springfield XD
Berretta
1911 9mm
Kahr
Shield

Are all good to go.
I would NOT use it in

Keltec
Jennings
Hi Points
Skyy
Ruger P9
Any surplus guns

The reasons most gun manufacturers say not to use it is because there is no standard. So they dont want to be responsible if you buy Billy Bobs ammo who might or might not take a chug of moonshine after every round.

No current ammo manufacturer wants to be sued for blowing up your gun and hurting you so its not like this ammo is a bomb inside your chamber

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