Was sizing some brass for my 300 weatherby tonight and started looking for load data to work up a load for it. I checked both the Nosler and Hornady manuals. One listed a load for IMR 7828 as starting at 80.5 gr with 84.5 being max the other listed 81.9 as the max load. This same thing was happening for more than one powder that I looked at. What gives????? Which data do you believe???? This data was for 180 grain bullets.