camera X in front of a ball

I've tried to make it, but there is 2 problems:

1.I don't know how to get vectorX of a bullet.

2. If you'll set Xmax and Xmin to 250 the camera will be more twitchy.

Maybe someone know any better solution?

docs.google.com/file/d/0B7p49JKt0CGLaXR6ME5xdjNRY2M/edit

I created what I think you were going for in 3 events:

The easy way

Thanks a lot