Got a case stuck in RCBS sizing die, die replaced by RCBS, tried again to size used case, very difficult even with high lubrication, base distorted. Tried using new case and same result, Using Dillon press. Any suggestions????
Mine are fairly difficult to size for a straight-walled case. Are you using sizing lube, or something else? I have the best results with Rooster sizing lube on all my brass, but it's a bit sticky and doesn't clean up as easily as others. If you are on your second die and having problems still, I'm betting you are using ordinary oil or something for lube that doesn't belong in there.
Is everything centered on the press? I've seen a press where the shell holder didn't quite snap clear in and was uncentered slightly. Can you try the dies in another press? No matter what, I'm curious to see how this turns out and what the problem is.
OK you definitely have a problem if unfired brass won't easily go through carbide sizing dies. Do you have a way to measure the inside diameter of the carbide sizing ring? If you have calipers the inside jaws on the back should work OK for this.
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