Anyone that picks a caliber because it "sounds cool" probably chooses/buys wine because it has a pretty label, too.
Talk about the wrong reasons to pick something! But then, I am glad that there are people around like that because they give the rest of us something to chuckle about.
This question about which 6.5 to pick/build/shoot/buy has been beat to DEATH many, many places...all without a clear winner. Me...I have a 6.5 Creedmoor and am building a 6.5 X 55 Scandinavian (that is what a lot of people call the modern, high pressure version of the 6.5 X 55 Swede....same dimensions but modern metallurgy) to play with so I can form my own opinion and not just read what the keyboard Kommandos have to say. A good way to figure out (if it makes YOU happy) which of those calibers to pick, is to take a look at the various match results where the rifle/caliber/bullet/etc is listed and see what the competitors seem to be having the best luck with. BEAR IN MIND, though, that some of the people shooting in these competitions could win with a Daisy BB gun......not all shooters are equal!!
Food for thought------The 6.5 Creedmoor brass questions/problems/opinions have to be qualified with the pressures they are loaded to. A lot of guys just HAVE TO PUT THE PEDAL to the metal all the time and
THAT will shorten brass life for about any caliber.
My opinion is for a person to pick a caliber--- a ballistically "likely" caliber---one suited to the expected mission----(as some oddball may be doable and could turn out to be the best thing since sliced bread, there is really no need to be re-inventing the wheel unless you just
HAVE TO) and build or buy a rifle make/model that rows YOUR BOAT and then go out and SHOOT, SHOOT, SHOOT! Practice and trigger time are very important and, while it can't make a complete doofus into a Carlos Hathcock, it can and usually WILL make a "naturally mediocre" shooter better.