I am a fan of Peterson brass for .408, 375, and 6.5. They are very consistent as far as weight goes and that helps with the AMP Annealer.I have used Nosler brass since it was introduced to the market after eons of reloading with Remington and Winchester brass. Always had short case life with Winchester brass so I I only bought it when Remington wasn't available. After buying a 7mm RUM that changed. Although this particular caliber is the King of brass eater's I was able to get sub MOA groups by using Nosler brass weighed in close weight to each one I loaded. Would like to know what may be better and why or what are your experiences with Nosler brass?
For .50 BMG I now have RWS (have not tried), Barrett, and RUAG. Barret and RUAG have given good results, even in an M82.
For 5.56 I am a huge fan of Lake City.