Can't remember any Winchester primer failures in 25 years or so of reloading, but have had many CCI primer failures: the anvil fell out before I could get it in the priming tube. They don't seem to ignite the charge as well as Winchesters, either.
Of course, it's been a couple of years since I've used 'em.
Of course, it's been a couple of years since I've used 'em.