CNC drilling

I just finished a new Jet mill conversion. In the past I have always
been afraid to drill under CNC control- Ive let the program single step
to location, then I operate the quill by hand.

What feed rates are used for CNC drilling? Do you calculate chip load
like you would for an end-mill? What is a reasonable chip load for a
drill? I suppose that varies by drill diameter?

ron ginger