oil press WAY TO HIGH during prime

Parts are reassembled. There was some difficulty removing bypass piston. Not alot, but enough to cause piston not to bypass. I can watch press gauge as bypass spring allows piston to move at about 65lbs. Wide open on drill allows press to rise close to 80psi. The current plan is when engine reaches operating temperature it will drop about 20psi putting operating pressure 40-60psi depending on rpm.
Thanks for the help.