Ok, i know the question has most Likely been asked before but let's face it things change.on a lee Loadmaster how many of you feel safe with Winchester primers small rifel.i would prefer to use cci but they seam to be in short supply (imagine that right).and yes i have the blast shield.
With the exception of 100 CCI small rifle primers Winchesters are the only primers I've ever used. In fact the instructions that came with my loadmaster (roughly 5 years old) explicitly recommended only Winchester and CCI brands. It's only been in the recent past that Lee switched and is now recommending CCI and Remington.
If you're really concerned about them buy the blast shield Lee offers if you don't have it already. It's certainly inexpensive enough.