It is not Saami spec and is anything thing higher than saami plus P; so it is not made up. It exists.If I'm not mistaken +p+ is a made up designation. I don't think there is a sami standard. Might as well call it " Ruger hot". Once in awhile, yeah. Steady diet, no. Unless your weapon is "triple proof tested" ymmv
The first couple of rounds in a loaded mag typically get a more battering of the bullet if they are removed from the gun 's chamber and rechambered. It can drive a bullet back into the case causing increased pressure and also such a bullets may not be as well sealed against oil and moisture.I carry the Fed 9BP +p+ in my 43x . Shoot the magazines to empty once a year for fresh ammo and show no evidence of extra wear with about 100 rounds of it so far.