I am putting already wrapping my mind around my next possible rifle. I have a 223AI that is about 90% done. I ordered two stocks from Kevin at Stockade, becouse there is such a long waiting list on them and I am thinking that I want to build a 6.5 of some sort. What are your thoughts on the differences between these two cartridges? Mainly looking for a lightweight rifle in a short action caliber that will do a lot of paper punching but can still reach out and knock a deer or antelope dead at 600 yards.