Problem With Redding Shoulder Resizing Die

[robrob]

I think my .223 to 300/221 brass has too thick of a neck. When I try to neck size only the Redding die is crushing the brass. If I pull the sizing ball out of the die I can fit the ball into the mouth of the once-fired brass but it won't fit into the shoulder resizing die without being damaged. I guess I need to do some neck turning.