I've been reloading for about 45 years , so I've used a lot of brands . I've found RWS to be second to none and have never had a single problem with it . I've had good and bad from pretty much every other manufacturer , including Norma and Lapua . There will always be variations in brass quality from one batch number to the next . If I use a different batch number of brass made by the same company , I will reduce my loads and work back up . I buy very large amounts of brass so this isn't that much of a chore for me , I do realise however that this might not be practical for everyone . The thing to keep in mind is just because you've had good results with one batch of brass from a particular manufacturer , don't assume that the next batch won't have any issues .
AB