Why when you compare factory velocities to hand loads the factory ammo advocates a faster Muzzle velocity than any of the hand load data can produce? For example- A 300 weatherby 180 accubond is claiming 3250 FPS using 180 grain. The fastest and most accurate load on Noslers web site shows using IMR 7828 max load is producing 3185 FPS. Hornady is claiming with there new high performance powder they are getting 200 feet per second faster and having less Pressure with there new super charged loads. I called Hodkdons and they said they are probably using a blended powder, wich is something hand loaders don't do. So do any of you have any experience on this subject?