Not sure why you'd cut a primer pocket that isn't crimped but that could be a problem. The annealing didn't hurt it at all, you'd burn the hell out of your fingers by the time you'd get the brass hot enough to weaken it. If you anneal though you should probably do it the right way, tempilaq with a case holder. Have you called Remington and asked them?
I have R-P brass that is over 40yrs old I only ever throw brass away when they are beyond help.
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