Since I have seen/read a lot of reasons for this and that in this thread.. I thought I would toss my own 2 cents worth in there. I will come out and say this.. I hate, loathe, do not trust Remington-Peters brass for anything but pistol ammo. their rifle cases SUCK! I have never had any good cases from R-P ever in my 49 years of life. any time I get R-P brass i either give it away to people whom beg me for it or I give it to the scrap man in town for money to buy high quality brass.
in grades of brass, consistent weight, consistent hardness, and consistent growth are all good things. in my mind for my hunting brass there is one more consistency I like to have. that is long life. to that end I anneal my brass every time I shoot it and re-load it. the best brass from these United states is Nosler. I have never heard of or used peterson, ALG, and some of these other brass companies. Until I came here I had never heard of these small brass companies. I like Nosler brass, they are grouped in 1/2 grain lots of 25, 50, 100, 250, 500, and 1000 count lots. very good/top shelf stuff. with some prep work the Hornady stuff is excellent brass. Winchester has slid downhill badly in the last two decades. Norma is umm, very good brass. I like it, but you get people, snobs, that think it's the R-P of Europe.. not sure of that. Norma beats the pants off of R-P. l have Lapua brass, that stuff is worth every penny you spend on it. RWS is so hard to find that I do not even try to find it any more. My first choice in hunting brass is Nosler, if I can not get Nosler brass; I like Norma, or Lapua. If I can not get what I need for a good price I will go with Hornady. I keep forgetting one brass company that I should give some print to; that would be Federal. they are in the mystery category. some brass is good and others are bad.. it's like they forget everything from batch to batch and if your get a good batch its great brass, if you get a bad batch they are not worth the price of scrap brass. My 270WSM, 270 Win, 300 Win Mag, 338 Win Mag and 444 Marlin all like different brass. they get what they like and I make no excuses for my choices. My varminting guns like Hornady and Nosler (17 Rem, 22-250, 22 Hornet). most of my guns like Nosler, Hornady, Lapua, and Norma. since I have been buying small quantities for hunting I have got small batches of Hornady 270 win (I have Nosler coming) , Nosler 270 WSM, Norma 338 Win Mag, and Hornady 444 Marlin. 300 Win Mag is the only one I can only find Nosler and Hornady. Lapua stopped making 300 Win Mag a while back. My 270 really loved that batch of Norma 270 Win I got back in college but those were lost (stolen) from me by someone. I have yet to find Norma 270 Win brass ever again. I would say this to anyone whom hunts and is willing to put some time in prepping brass. get good brass and stick with that brass. if you can, get RCBS neck reaming dies(ream the necks for consistent neck tension), keep the brass at a standard (you set) length, uniform the flash holes, uniform the primer pockets, and keep them in 0.01 grain lots if you can. 1/2 grain lots, and find an COAL the rifle likes and make sure you do your job on the hunt. because you can rest assured if you do your job reloading; your ammo you make will do it's job with monotonous regularity.