it depends on several factors, I've got some brass that's been reloaded 5,6, 7 times or more. After you clean the brass, you just have to inspect it, any cracks or dents or dings, scrap it. Also, depends on whether its rifle calibers or pistol calibers. and also on whether or not you're loading to max loads, the higher the load, the more stress and fatigue on the case. Some guys claim to be able to push lower pressure hand gun calibers to 20-30 reloads. I've not shot that much. And it depends on the brand of the brass to begin with as well. Higher quality stuff usually can get more cycles out of. And then there is the annealing thing as well where you can soften and strengthen brass. I've not gotten into that either. but its essentially baking the brass in an oven for X number of hours to extend case life. biggest thing to do is separate your brass by known loading cycles and just inspect it. I've not blown a case yet