Regarding brass colored WLP's, I have noticed they are often hard to seat fully without extraordinary amount of pressure, a trait I used to associate with CCI primers 35 or more years ago. These primers vary greatly in color within the same tray.
A few years ago, I was given 500 .223 crappy reloads from Paragon that had primers that looked like that and varied in seating depth, color and finish. They also had a high failure to fire rate.
I wonder if perhaps Winchester is outsourcing their primers from the El Crappola storm door and munitions works in Bangladesh.