I called Redding today and explained the issue. The guy I spoke with had me measure the expander ball to ensure it is the right size. He also confirmed that I am using the right dies (which I am). He said this happens with shooters that anneal brass after every firing. He told me to use dry lube generously and chamfer more than what I was and after the first firing I shouldn’t have the problem.
I took the rounds that didn’t collapse to the range today and they shot well so I guess we shall see.
Thanks for the input and help trouble shooting the issue.
