bigcountry

I would say you are not sizing hard enough. I do it three times. When I say that, I mean I size firmly, turn about 100 degree, size again firmly, turn my shell again and do it again. On some collet dies, I have had to remove the mandrel, and take a piece of emory cloth and put in a drill and reduce .002-.004. But I know folks who have overdid it.

As long as you bullet is being held without slipping in an out is all you care about.