Should be quite a hot rod. Found it in my old PO Ackley book. Appears to be a more or less a .25-06 Improved necked down to 6mm. Book says 3450 fps with a 100 grain bullet. At least brass should be easy to come by. I doubt if barrels last all that long.
I once asked a liberal "What is it with you people? Is it ignorance or apathy?'
He said, "Well, I don't know and I don't care.'"