Brass quality makes a big difference to us handloaders. Reloaders dont care as much. Handloaders taylor each piece of brass to be exactly the same as the next piece. Polish, Trim, Chamfer, Deburr flash holes, Uniform Primer pockets, Polish case mouth with steel wool, and weigh each brass piece and cull out the oddballs.
I love Nosler, Lapua, and Norma brass. I've had lotsa problems with Hornady and a few issues with Winchester. Hornady is the worst I've ever dealt with and in multiple calibers. I'd have saved money if when I started I would just have gone with the top dogs.