Does Hogdgon use calculated values and then reduce them by 30% for their load data? I am working up a load that I had trouble finding the powder for in either of my load manuals (universal)--With help from this forum somebody got me the page from Hornady's 5th ed that had the data I needed. Then I heard that Unique was a similar powder so I made a little chart and compared the Unique loads in the other two manuals to get an Idea of whether my load would be safe or not. I also searched and found some people that had a load that would be .4 grains over the max load according to Hogdgon but .4 grains less than the Hornady manual. Now I know that Lynman, lee, Hornady etc actually test what they load---Does Hogdgon?