I've been looking at the specs given in my reloading manuals and the wall thickness of 30-30 (at the neck) isn't listed. Using my calipers, it looks to be around .011, while .270 and .308 looks around .015. This is probably why I'm having problems keeping the neck perfectly straight, but I don't know how accurate my measurments are.
I have been having some trouble reloading 30-30. Seems the resizing operation cants the neck slightly. I've been getting very good accuracy, but I can't help but think it might be better if this problem was solved.
The dies are Redding. My first attempt at solving this problem was to polish the expander ball. The polishing took about a half a thousandth off the original dia of .307". It's now about .3065". That didn't work.
I apply Imperial sizing die wax, brush case necks and apply mica to the neck interior prior to resizing.
Called Redding this week, and the tech advisor suggested getting a carbide expander button. It's on the way right now.
Anybody got any other ideas?