I have a question in regards to full length resizing. I for into reloading due to the possible accuracy increases for my 6.5 Bergara HMR. It's the caliber that I am looking forward to hand loading for. I have been reloading for my .223 in preparation in order to learn the basics. Also, I have been reading A LOT. Here's where my dilemma comes in. I have 80 once fired cases. 40 Hornadys, 20 S&B's, and 20 Federals for my 6.5 Creedmoor. All the reading I have seen say that a BIG advantage with reloading is having cases that are formed to your chamber. This occurs after firing the case in your given firearm. The firing "pressure fits" itself to your chamber. So, if that's the case, why would I full length resize the case. Shouldn't I just neck resize?