Personally, when I shoot factory, be it .22, centerfire rifle, or shotshells, I use Federal. I have yet to own a gun that didnt prefer federal ammo. For me, they have always been the most accurate as well. Better quality too. I had a Winchester factory .303 British round blow in half in the chamber, a friend had this happen in .243 as well. I've seen Remington brass that was cracked at the neck, and actually "Peeling" apart." Where the worst thing that I have seen with Federal is tarnishing on the case. They have my vote.