Welcome to the Sons of Ether JPL, the playgrounds for Matter mages. And there is a whole coven living in them, and when they work together, well, you know how that turns out: Flying cars, Autonomous buildings (with or without murderous intention) and plans for guns that aim themselves.
But now the current archmage of the coven wants to best them. He is pretty old, he packs Arete 7. And a 5 in Matter, Correspondence and Forces, a 4 in Prime, 3 in Time, 1 in Spirit and Mind and finally nothing in Life and Entropy. And he wants to make the self aiming guns of the fledgeling with that cursed entropy sphere ("Hey, I just happened to aim in that direction he was about to turn to.") obsolete. So... self aiming bullets were put upon the agenda by him. And since he read Grunts! by Mary Gentle, he thinks about the literal smart type. The type with an LCD telling "Sir! Ready for action, sir! Shoot me at the bastards now sir!" in bright gleaming letters and to be fired from a machinegun so they home in on the target. Paradox be dammned, that's what he asks for.
Just... he has no mind or spirit large enough to create a Spirit/AI to make the bullets actually smart.
What combination of his other spheres could be used to make a resemblence of "smart ammunition" that aims and homes in on non-human beings, especially Vampires? Remember that the "smart bullet" itself should be able to find the target to fit into its stats and then aim after being fired.