Friend of mine uses Wilson dies, reloading 5 cases of 6 br brass. Lightly cleans the neck with steel wool and neck sizes the brass no lube. Shoots 30 times a day every day, in other words this brass is reloaded 6 times a day. This has been going on for a year and to the best of my knowledge he's still using the same 5 cases. Barrel is probbly getting due for replacement, I know he has other rifles that he's shot the barrels out of. Are they really shot out? Looking at them with a bore scope and seeing the aligator hide forward of the chamber area, yup they were ready.
BTW these are not factory rifles but custom benchrest. He uses Kreiger barrels.