Boarder Line Low Oil Pressure

Took it out today to run through the RPM range while checking the pressure. Stays pretty consistence through the RPM range at temp. Where I live is typically back roads and never exceed 2,500 rpm. However, took it out on the main road for a few miles consistent at 50mph and 2,700 rpm. Started to hear top end ticking like it's coming from the valve assembly. Immediately went back to the garage and the tick started to slowly go away as it idled for a bit.