Yukon,
Yup, it be rimmed.
As it happens, it isn't really an 8mm-06 any more. I can't find "rimmed .30-06" brass, so I've changed to the 7X65R Brenneke brass, to which I'll blow out the taper, blow the shoulder forward about .100", and neck up to 8mm. It will be nearly 7mm Rem Mag capacity. I think I'll call it the "8X65R Haeme Mor" which would be big stick (club) or big hammer in Scots Gaelic, according to a Gaelic friend of mine ;-)
I reckon it'd be unique *then*!!!
Cheers/buffler