Re: big differences in loading data
"This is a pretty big deviation in a small cartridge,.."
Don't "trust" any of 'em, all they are is books and we shoot guns.
Manuals are no more than guides, they can't possible give us absolutes. The makers develop their data with different rifles and their results reflect those differences, and that's all it amounts to. Asking others who are also using different rifles from your's becomes the blind leading the blind. All of those differences simply prove my point; ONLY <span style="text-decoration: underline">you</span> can develop a full power load that's safe to use in your rifle, no one else can do it for you. Your rifle is different from all of the others so, "start low and only work up to book max unless excess pressure signs appear sooner."