Getting a 6.5 x 47L rifle built by Accurate Ordnance. I need to buy some extra reloading equipment and need a little help. Will be using Rock chucker press, new Lapua brass and Berger 140g hybrids. Was recommended the Redding s type bushing full length sizer. Ok Im good there. Then I read to take out the expander ball. Ok how do I iron out my case mouths? Read to buy a expander mandrel....another step in reloading. OR is this something that only needs to be done on the first loading OR when deemed necessary if a case mouth got dinged on ejection?? Or would this have to be done everytime its reloaded? In my rookie mind I would think after they are fired the mouth would he too big and need to be resized with the bushing to get it back down to .002 +/- undersize. I have only reloaded .308 with Forster F/L die and ultra micrometer seater die. This level of accuracy is new to me. I will NOT be neck turning. Thanks in advance!