When the brass gets hard to chamber its time to size the shoulder/body back.

Many folks, me included don't do a full resize, we use a redding body die to size the shoulder back down and then use the collet die for the neck. Actually I don't wait for the brass to get hard to chamber but I do the body die and anneal on the 5th load. I have found that routine coupled with good brass and avoiding chasing the last little bit of velocity has left me with nearly infinite brass life, well at least really good brass life.

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