I'm with Wil and Sawdustdad. I have at least 2,000 of everything that has still to be loaded and fired, except for one lot of just 1,000 .30-06 1968 pull-downs, because that was all I had the money for at the time. I have bought just 500 piece lots to evaluate a headstamp, though.
I once weighed about 50 Starline .45 Auto cases, along with IMI Match, Winchester, Top Brass, Federal, and WCC. Of these, Starline and Top Brass had half the weight variance of the others. Starline seemed to have the same long life expectancy of Winchester, which was very good brass at that time (I'm talking about 20 years back and before the outsourcing got so pronounced; I can't speak for it today). I have used Starline exclusively for pistol chamberings for some time, though if Top Brass ever got back into the business, I would use their new brass, too. I still have a lot of their .44 Magnum that has lasted very well.