I have never used Winchester brass for my 280's, even though I have used it with good results in my 270 Win.. I have used Norma, Nosler and Remington when loading for the 280. I have decided to stick with just Remington even though it takes a like more work. Norma 280 brass had more volume and was very soft, Nosler brass was very good out of the box but it too is soft and the primer pockets stretched with only a few loads. Remington is tough and the volume is uniform. My 280 Rem is my go to deer rifle, with RP cases, Fed 210 primers, 54.5 grains of RL-17 I am right at 3000 ft/sec with a 140 Accubond bullet and with very good accuracy. I can reload the brass 1/2 dozen times with out loose primer pockets or split necks.