Dimensions of this cartridge on the wall at Nosler's booth shows a base diameter of .473 and a case length of 2.525. Looks like a rebated rim to fit 30-06 bolts, but much fatter with a loaded length of 3.340 inches. 93 grains of water is what the sign says, along with the Name Flat Out Lights Out. 129 bullet at 3400 fps.
It states that the 26 Nosler has the same velocity at 400 yards as the 260 Remington has at the muzzle.
Hard to tell but the drawing on
http://www.26nosler.com references .532 base. Seems silly to rebate the rim to .473 but have seen that listed in other places.
