John,
I ran several fire-formed 250 Ackley cases through a 6.5 Creedmoor sizer, and out came usable cases. I also fired some 250 Savage ammo loaded with 87 grain HP-TNTs meant for the 250 Ackley in a 6.5 Creedmoor, and though accuracy was rather poor, nicely formed cases resulted. Funny thing......the rifle still shot minute of elk vitals at 100 yards sort of groups. So I suppose if a 6.5 Creed shooter found himself on a hunt with no ammo, and a supply of 250 Savage, he could continue onward!
