I was given 10 pieces of ADG brass in 270 Win, I have another 10 pieces of Lapua, 10 pieces of Norma, 10 pieces of Nosler, and 10 pieces of Hornady.
they are all on their 20th firings: here is what I can tell you. I hunt and practice with all of this brass. I anneal after every third firing.
my best groups come from Lapua and Nosler
Norma and Hornady gave the best velocity
ADG brass was the easiest to resize.
Nosler was the most consistent through the chrono. not by much over Lapua and Norma.
ADG has been the one brass that has not grown much. 0.024" average over the whole experiment.
Hornady needed the most prep work and grew the most over the whole test.
overall the two rockstars have been Nosler and Lapua.
now for the personal opinion of each of the brass test groups:
ADG. nothing special.. over priced. (better than winchester, R-P, Privi, Federal and Bertram)
Hornady, the least expensive, most prep intensive, but solid brass.
Nosler, best choice for the money
Lapua, my favorite brass until Nosler started making brass. I still love this brass but it is still the second most expensive brass here.
I just put in an order for 300 pieces of Nosler brass for my 270 Win's.