RE: Problem with 270WSM case expansion
Since none of these cases will chamber in your rifle after sizing, you are doing something to them with the die that prevents chambering. If your expander ball is sticking on the way out, you might be pulling the shoulder forward as the neck is being expanded. Other than that, case length could be the problem but thats pretty rare to find a case that stretches that much on one resizing. Take a resized case and smoke it up one side with a candle and try to chamber it. Then maybe you can see where its too big. Or if your expander is sticking, just lube the inside of a case neck and size one and try that. Good luck.