Certain locations on the press that can get powder on it, I will use a heavy coating of powdered graphite to keep the parts lubed. Other parts where powder will not touch, I use an oil based lube, like a synthetic gun oil or basic 3 in 1 oil. It works fine.
I agree with this Chad graphite on primer slide, oil on the rest .
All he is trying to follow harnady instruction.
Hornady dry film lube is made to meet mill spec.
It is designed to lube and clean ar style rifles.
Since it leaves a dry non oily film it is good on powder drops.