Pistol brass (9mm and 45 ACP) seems to last forever, though hot hot you load would no doubt effect case life, vis-a-vis loosened primer pockets.
Re rifle brass, when I was shooting a Garand (30-06) using range pick-up Match Brass, I used to get 20 firings. Using Match Brass, once fired, in bolt guns, even with full length sizing, I got tired of counting, besides I had a lot of brass, courtesy of the USCM at Quantico, back when the marines were still shooting M-14's in competition.
Re 38 Special, brass cases seemed to last longer than nickel, or so it seemed. Either way, they lasted a long time.
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