How many bad dies did you get?

No bad dies but a bad shellholder that wasn't machined to the right size and it oversized the shoulder. I've got several die sets for many pistol and rifle calibers from Hornady, RCBS, Redding, Lyman, two Lee sets, and Weatherby, and NO problems with any.
Shellholders need to be checked especially if mixing brands. Check the distance from the top of the shellholder to the ledge that the case sits on.

I returned a RCBS 30 carbine sizer (steel, not carbide) back in the 1970's when I found it would not resize the brass enough to grip the bullet. Tried several types of brass and returned 4 different samples of brass with the die. RCBS replaced it very quickly. Their customer service is at the top. I have ordered different items from them over the past 40 years and they have always made me happy! Can't go wrong with them!

I currently have 4 sets of RCBS dies. The only problem has been with an expander that was still rough from machining. I could feel every ridge when used. Since I didn't want to wait for a replacement, I chucked it in the lathe and polished it.

The casting for the Rockchucker press is made in China, but the dies are made here in the U.S., in Oroville, CA.

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Reloaderfred when I bought my rockchucker China was still a territory.

I have only had two dies with problems. Bothe were Lee dies that scratched the brass. Lee said they would polish them but it was just easier and faster to do it myself.

And both of my Rockchuckers were made in the good ol' USA when I bought them, back before RCBS was purchased by ATK..........

Fred

The casting for the Rockchucker press is made in China, but the dies are made here in the U.S., in Oroville, CA.

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RCBS steadfastly denies that any part of the Rockchucker Supreme press is made in China.

I've been reloading since 1976 with mostly RCBS dies, and I've never had to return a single one because of a defect. Maybe I've been lucky; I don't know. Everybody ships out a turd periodically, even Redding (whose dies I slightly prefer over RCBS).