I don't understand about opening up the back of the chamber. If you're getting CHE, isn't the brass going to just expand out to the new, opened dimension and cause clicks again? Or is the idea that the existing die used will size it down below the new, opened up dimension, whereas it would not with the tighter chamber?
Or is the idea that once the brass expands out to the newer, opened up dimension, it will be worn out and time to trash?
I've not had much luck resizing case heads much at all. I once modified a 30.06 die and bumped the shoulder back a ridiculous .014", and still the lower case was oversize. (This was trying to save some military match brass that must have been fired in a huge chamber...)
Vettepilot