Over the years I have found that who makes the brass isn't as important as keeping alike brass together. Brass that came out of the same lot number of factory ammo or the same bag of purchased ammo should stay together. If you want to know what the best brass there is, it's military Lake City brass in 5.56, 308 and 30-06. It is heavier than most other brass and unless abused by over pressure can be loaded two or three times more than other brass. One note on military brass, do not use brass that came out of a machine gun if it was fired in a machine gun. It gets damaged during the ejection process by being jerked out of the chamber before the pressures have dropped down. I have found that there is an unusually high rate of case neck damage as well as stretching of the case. I have also found that your pet load will shoot just as well in Winchester brass, as Remington brass, as Federal or for that matter any other brass. Be careful sizing it and trimming it and your point of impact might shift necessitating a few clicks of sight adjustment but the grouping is generally not affected. OK, now let the howling in protest begin.