My PT-25 experienced light-strikes with Fiocchi Ammo but was fine with the other brands I used (honestly, I don't shoot .25acp much anymore for obvious reasons
).
However, with either my PT-22, Beretta 21A, GSG 1911-22 or even Phoenix HP 22A, they all function reliably using either CCI Stingers or the Aguila HV Ammo which is muy caliente!