Oil pump priming issue

Primed a small block yesterday,,,,poured a small amount of oil in the pump went I assembled it a couple of weeks ago....I use a speed wrench and turn the pump by hand....after a few seconds of cranking I had 60 psi of oil....
Huh,? I'm lost. Always used the hex tool.and drill. Not knocking you, at all, but I like to learn new or unorthodox ways.