I'm an avid shooter & re-loader. I have been reloading for my AR for quite some time. I have been using .223 brass exclusively, but am getting down to the end of my stash. I have a grip of 556 brass & plan to start in on that soon! I'm wondering what is everyone's favorite, & least favorite 556 brass to reload? What head stamps to look for & what ones to look out for? Thank you!