Some people have got over 50 full length sizing cycles per case with Western Cartridge Company WCC58 match brass made for the US Army International Teams' 300 meter free rifles; loaded with ball powder under 200 grain FMJBT match bullets. Case weight's about 150 grains and has very uniform wall thickness.
2 years later, WCC60 was equally as uniform weighing about 157 grains per case. It had ball powder and 197 grain HPBT match bullets. Dozens of reloads per case.
Many shooters haven’t heard of the 58 or 60 WCC Brass. I looked for years and found some of both...alas I seldom shoot the 308 these days. But I like being reminded of it. I shot my smallest group ever with some 58 brass, PP2000, and Berger 175s as I was chrony’ing a long range load.
Sorry for the digression.
Gerald