This is just a recommendation from a guy who has split several cases by using the data from old, out of date manuals. When I buy a new manual, usually Nosler or Sierra, I put the older one away from easy reach. I may check it occasionally for referrence, but that's all. Powder is the dangerous element in this. It changes from time to time. As much as I like IMR4198 it's an especially volatile bugger that's caused me grief by using loadings from outdated manuals. It's the main reason I resorted to keeping old manuals at arms length. Best wishes.