Hi Byron, according to Tisas "Yes, you may fire +P ammunition in your Tisas Pistol. However is loaded to produce more velocity, pressure and power than standard ammunition. This will result in more recoil and wear on parts of your firearm more than standard ammunition."
Stay safe & have a great day!

I can't really say much more than has been mentioned below. Just remember, just because you Can use +P ammo doesn't mean you should feed it a steady diet of +P.

Yes it is rated for +p but be aware a steady diet of +p ammo will increase wear and tear i would install aheaver recoil spring if I was going to shoot a lot of +p

Hi Byron and welcome. Yes, you may fire +P ammunition in your Tisas Pistol. However is loaded to produce more velocity, pressure and power than standard ammunition. This will result in more recoil and wear on parts of your firearm more than standard ammunition. Cheers and happy holidays! --- https://tisasusa.com/faq/#:~:text=Yes%2C%20you%20may%20fire%20%2BP%20ammunition%20in%20your%20Tisas%20Pistol.