It may also be that your collet is collapsing as far as is possible and not clamping on the mandrel as such and your necks are springing back.
Annealing the case necks would be the solution.
Type: Posts; User: veitnamcam
It may also be that your collet is collapsing as far as is possible and not clamping on the mandrel as such and your necks are springing back.
Annealing the case necks would be the solution.