If I'm loading +P+, I will count and toss them after 10 reloads. Otherwise, I load until they start showing neck splits.
High power rifle reloads for target and hunting, I keep good records of, and toss an entire batch when about 10 percent start to show problems. I will also toss a batch of rifle brass when it needs to be trimmed for the third time.
If you think a mighty military force is expensive, wait 'til you see what a weak one costs.