Thread: Case base separation

Originally Posted by Bagheera

Just posting a pic of it. 3 cases.
The sideways one has no separation just the bright line from stretch/size over many cycles.

Attachment 260990

The bright line on case 1 vertical just shows the junction between web and drawn section of the case. You will see on the separated ones that this occurs above the web and it's generally caused by continual full length sizing after every firing. Neck sizing greatly extends case life and can be done with a full length die by winding it out a turn or two . This illustration of a case sort of explains things best.