I'm getting set to load up some 500 gr Hornady DGXs for my Win M70 .458. In looking at load data published by Hornady's 10th Edition, it lists a max load of 76.9 gr of Accurate 2230 for 2150 fps, and 78.3 gr for 2200 fps and a COL of 3.310". This seems significantly higher than Western Powders max load of 72.0 gr of Accurate 2230 for 2159 fps and a COL of 3.305". Why is there such a big difference and which data should I follow in working up a load?
