Oddly enough, I'm a beginner too--and ran into problems with my first go at 270 as well. What I finally figured out was the problem was that the die itself was not adjusted properly. I just assumed that the decap pin and neck resizing collar were properly installed and positioned, but they weren't--I'm guessing somebody screwed around with the die while on the display shelf at my LGS. In other words, just like getting a new rifle, I now disassemble, clean, adjust and reassemble any dies I buy before using them.
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