If you have purchased an entire bag full of them, then I suggest you order an extra decapping pin and turn it down until it fits. If it's just 50-100, you can decap each case with a nail, then ream out the flashholes with a drill. If it's just a handful, you can just toss 'em.
Ordinarily it might not seem like it's worth the effort. But look at it this way. You know they're truly once-fired. So if you have a lot of them, it might be worth trying. I have a bag of 120 DAG cases I reamed out. They were just too pretty to throw away. They look like new brass, even on the inside. I've since discovered that the brass gets thick towards the base and doesn't like Berry's HB bullets, but that's fine. They're tagged for premium HPs, anyway.