Subject: Bullet penetration of spinning disc

A bullet, shot at a disc shaped object. Assuming it will normally penetrate 
the disc. What would happen if the disc was spinning on an axis, like a tire. 
Would the movement deflect the bullet? And how fast would the it have to 
rotate for it to happen? 

I'm assuming that since the bullet is moving more or less straight, and it 
takes time to penetrate the object. Then high RPM on the disc would mean that 
in order for penetration the bullet would have to exert force in a spiral 
motion. And that can't happen, I think. So it would have to be deflected?

Pick any materials, calibers, distances etc. you like. I just want to know if 
my guestimate is right ;) And maybe see how it's calculated.

Re: Bullet penetration of spinning disc