Did some on line research. The .264 Thor (8mm Rem Mag necked to .264) has 98 gr. water case capacity vs. 26 Nosler's 90 gr. It seems as slower and slower powders are available, the definition of "over bore" gets pushed back...
The Thor with super slow powders can push a 140 gr. bullet nearly, but not quite 3,400 fps.
With slow powders, the 26 should be able to push 140's at 3,200, one would think.
And, 160's at 3,000+.
We'll see...
DF
