What I am understanding is that if I ever have to use magnum primers that did not call for it, start load development over again by reducing powder charge and work my way back up. Hodgdon's load data for the .308 Win 168gr bullet and Varget powder ... minimum 41.0gr ... maximum 45.0gr. So at my 44.0gr load, I would be "probably" be okay but would be very wise to back off to say 43.0gr and move forward slowly in say .2gr increments.

This makes a lot of sense now.