Thread: tight closing the bolt

Originally Posted by 6x47

The issue is almost certainly the bottom of the case (head/ web area) has expanded to fully reach the chamber dimensions. If FL sizing doesn't fix the problem without shifting the shoulder too much ( say 5 thou max), you need to use a small base die before running the cases through their std resizing.

This is definitely a problem often overlooked.
If you cant get a small base die, then giving the web of the case a rub with fine emery paper will overcome the problem