Very few in sbr are doing any annealing (only one that I know of and I think even he has stopped ) the need for annealing is more a function of chamber reamer and sizing dies that match(or rather do not match ) than anything to do with pressure. Fix that and all the brass issues go away .One of our sbr competitors is currently running a test on annealing , tracking two sets of brass through many firings and agg sizes to see if there is any gain , so far no improvement on aggs, time will tell on the brass life.
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