Everyone has favourite breeds of brass, dogs or trucks. I like Federal because I have used it for years, simply because my .243 liked Federal factory years ago before I got into loading. I use Winchester in my .308 because that's what I have most of. Some guy shoots Federal factory on the range with a Garand and does'nt clean up after himself, so I had to buy a P17.
I FL size for the 1st time, then neck size all my range brass. I don't run them hard, and I bin anyting I don't like the look of(it's free, no point in taking chances)
Sometimes I swing by the range just to dive in the garbage cans.
Some people don't like Federal, some don't like Winchester and some don't like skinny chicks.
I have a bunch of .303 brass, Enfeild actions are cheap, and I need something in 6.5.