Yeah, I saw you tried it already in the opening post, just wondered what would happen with the carbide expander ball.
The news doesn't sound good, but you might try it a little more. The badly-sized brass can be straightened out by running them into the sizing die (without the decapping stem) a couple of times, turning the case 1/2 turn between each sizing.
I'm beginning to wonder if the brass was unevenly annealed at the factory. If so, running it into the sizer a couple more times will work work-harden it somewhat, evening it out.
The other possibility is that the rim thickness is a little uneven. This would tilt the cases as little as they're being pulled over the expander ball. It's beginni9ng to sound more and more like a brass problem.
