Well,
The 6.5x70R cases at Buffalo Arms Bertram Box of 20 showed up and they were not what I expected. The box had a handwritten 6.5 x 70R on it. I measured them, 10.53mm rim dia , 8.97mm dia down next to the rim, and 8.90mm dia at the bullet end, 8.04mm inside dia at the bullet end. This has no taper like my casting has.
I did some searching and found this link

http://forum1.aimoo.com/cast___boolits__/Shooters-com/Need-help-again-6-5X70R-1-353180.html

The dimensions given by Bruce for 6.5x70R match my casting. Guess I send the brass back, it's the wrong stuff.