I've noticed with my '06 brass - without annealing it splits the case necks & bullets don't press the same. I've got to where all brass is annealed every 3rd firing. I can get 12 to 16 firings out of '06 brass. I can't ever recall throwing away any .243 brass.
I don't shoot much further than 400 to 600yds before the jungle gets in the way.
PS - When I started shooting the 223wssm - the brass has to be annealed or the neck won't quite seal properly when firing (very thick). Softening the neck, due to annealing, fixed the problem.
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