Personally I think you are right..but looking for loading data from people on the net when all the info is right there at your fingertips from all the powder makers?? Uuummm Think I'd trust the load data from companies first and foremost. And we are talking more of a chamber differenc in the context that the OP brought up rather than loading data itself. Sticking a bullet up against the rifling Will change everything for the most part. Not dissing you..just pointing out the obvious. I happened to do that with a 22-250 round once. A fairly mild round locked the bolt right up with a longer seated bullet. Scary

As far as the annealing of military brass it has been required mainly IIRC for longer term ammunition storage. I seem to remember reading of a change implemented in the 1919-1920 era.. High intensity ammo and brass cracking. But that was at a time when our gummit wasn't involved in all this world policing stuff and ammo was stored for 15-20 yrs or more. Just an observation