What I do for a bullet make that I do not have the data for . What I do is just use the data of about the same weight and start low and work the load that the gun tells me. Like is stated the data is just a guide.Also Alliant is part of the ATK group and so is Spree and CCI and LC. there is some others but do not know off hand.That is why that if you look how the reply put down of the 3 company.