As with all 6.5mm since, well, a hundred years ago... ~140. Nothing new under the sun.
Peculiar the mentality that exists: 1950s "we designed a better 30-06: shorter, yet after designing a new powder we still come up short in velocity but it's better and everyone will swallow that until we come up with something else and claim to have made something better". 2007 "we designed a better rifle round than any else in history: it's not a true short action and we come full circle to using old and slow powders predating the 1950s and copied something a guy made around WW1, copied Ackley's improvement to it and just necked up the caliber like some wildcatter probably did in the 1920s... and guess what, {hush hush- they bought it because we indoctrinated them with all it's non-existent advantages over other cartridges... that and flushed the market with it instead of everything else} AND we affixed the name of a renowned range at Queens, NY on Long Island that was built in 1872."
Ironic that the Creed family farm with it's terrain that resembled that of a English moorland was purchased for building the "Creedmoor" range on which large bore, slow bullets could be shot in international competition.
For the record: I don't dislike the Slobbermore cartridges, I just despise (and have always despised) fads. Most rifles on shelves now are something with a new chambering... even 308win has taken a large hit (I don't care as I don't desire that either) but these pointless fads redirect proper attention from a myriad of just as good or better rounds. The only way to end it is not to buy into the ad campaigns.
Funny thing, that Creedmoor range is now gone and the site features a psych hospital.