I have caught a CC, 20 minutes after my feeder went off, at the far end of a 15 acre pond that had a gut full of fish food, so I do believe they travel a good ways to the feeder.

I also hand feed a couple times a week in other areas of the pond when I come by there, to the point that I will see ripples in the water of fish coming in from all directions when I pull up in my truck.

But then I don't have my feeder going off for a very long period, its not an attempt to feed them all they can eat, what gets thrown from the feeder usually gets cleaned up in under a minute, churning the water and fighting for what they can get, it would cost too much to feed them as much as they can clean up.

All the really good ideas I've ever had came to me while I was milking a cow.