Small Block Oil Pump Priming

I am using a standard volume Melling pump and I do not know what the speed of the drill is but it was a lot slower than what it turns without the load.

In any case I was getting plenty of oil flow up through the push rods.

Isn't 85 psi awfully high for the speed you can turn the pump with a drill? The rule of thumb I have always gone by is 10 psi for each 1000 rpm.