Like others have said, straight walled handgun brass seems to last about for ever, just keep an eye on splits near the mouth, and splits or burn holes in the case body, and enlarged primer openings.
Bottle necked cartridges are a different story, as case flow resulting in weakened case webbs, and resulting case failure can happen relatively quickly if brass is over re-sized, or the gun being used has excessive headspace. I limit my used rifle brass to picking up what I see other shooters leave after a day of sighting in with factory new loads.
One trick to seeing if used rifle brass is safe is to get a piece of thin wire, and bend a little hook on the end, then run it inside the case of a bottle necked rifle brass, feeling with it along the inside, down to the base. If it catches a little in the area of the case webb, it means a case with insipid case head separation - time to trash it.
Larry