Anyone had problems with the cups burning through with Winchester WLR primers? I've had this happen 4 times here lately with 2 different rifles and calibers. First off a week or so ago with an Arisakaicon T38 and twice today with my M1Aicon. Blamed it on old cases with the T38 to begin with but after it happened today with once fired 7.62mm NATO cases I took a closer look. The gas isn't leaking between primer and case as I assumed, it's actually burning a small hole through the cup right in the corner radius where the cup folds to form a bottom. All primers are from the same batch purchased in 11-13. Looked for a lot number on the carton and didn't see anything marked as such. I hate to think this is a bad lot but don't know of any other explanation for the issues I'm having. Any thoughts?
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