I've not got enough collected data to say for sure either way, but I noticed problems with my .243 cases approaching 10 firings per, fliers and erratic speeds etc, I think it would help, intending to anneal brass every couple of firings now - but I keep changing rifles and have 450 6.5x47 cases and 600 or so 6.5x55 cases so it hasn't come up yet
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