It depends.
I've got over 30 reloads so far with a batch of 6XC cases. No anealing. "Light" full length sizing. No expander ball in the die. (I don't understand why they even make dies with expander balls.) My load has a calculated 42,000 psi.
On the other hand, I could only get about 5 reloads from new Winchester .223 cases using Remington primers before the primers would fall out. The old Wincnester primers, the plated ones that I suspect are thicker, were good for about 10 and then I got neck splits. The load was not a hot one: 24 grains of Varget and a 69 grain bullet.
