Yep, as ButlerFord45 indicates, mixed brass IS NOT THE WAY TO GO!
Save your mixed lot/brand brass for "banger" loads, but for quality and consistancy, buy as large a quanity of brass as you think you might need for the forsee able future and keep that for your serious shooting/hunting.
I have related in previous posts, a very interesting experience using same brand but different lot brass for some load development.
I won't bore everyone with it again, but will answer anyone directly who may be interested.
I use mixed lot and brand for my "reduced" practice loads with fine results, but these are not intended for anything more important then close range practice.
Here the bullets are light, the velocities low, the range short and the load doesn't need to be better then minute of tin can.
Therefore, it is an ideal place to use range brass and other odds and ends, thus saving my good brass supply for more important things.
keep em coming!
CDOC