I hope I don't jinks myself, but I have run several different kinds of ammo without any issues.
On another note, I have not received my free ammo for buying the Compact. Anyone else received their ammo?
I bought a M&P22c last week. I took it home, cleaned it, and took it to the range last weekend. I ran CCI Mini Mags, CCI Standard Velocity, and Remington Golden Bullets through it with out a hitch.