mix a few cases in with the pork skins and see if he notices the difference
on the serious side where are all the blog writers on this one. Has anyone ever done a serious test on annealing on the firing line? If so I can't find it, makes me wonder if the time I spend annealing is just snake oil.
Duh.............yeah. Bryan Litz did exactly that and documented in his latest book. In short, he compared annealed-every-time brass with non-annealed brass which had been fired 10 times. He could not detect any difference at the target. Note that that is NOT the same as saying that there is no difference, only that he did not detect it. His test was carefully done, as is all his work, but it was quite limited.
I suspect there is a difference but it's too small to be measured because of the way we test; i.e. humans firing bullets from hand made ammo through an unknown atmosphere. But, like primer pocket uniforming, I believe annealing-every-time is one of those tiny improvements which, when added together, makes a difference.
In any event, annealing will make your brass last longer. I anneal every cycle and I long ago stopped counting how many times I fire my brass. I simply keep using it until the primer pockets wear out. My previous problems with neck cracking is now not an issue.