It is not uncommon to have a case split every outing. I normally shoot 150 to 200 rounds on range trips. Monday, 3 cases made the odd sounding "ting" when thrown into the range box. One was a Federal commercial and I have had a lot of splits with these. Many years ago, I seem to remember buying a thousand once fired Federals from a range of some sort. They have been reloaded many times. A WCC case from 50 years ago also split. Again, no telling how many times it has been fired. The last was a WW commercial with a head so banged up, you could only see 1 W.
I have no problems with how long these cases have lasted.
I have no problems with how long these cases have lasted.