04-05-2014, 05:54 PM
You can tell by inspection that the 6.5x40 has less volume than the 6.8 SPC. Thus the only way the velocities can get to where they are is with interesting pressures. They have to be well above the Grendel, and are possibly greater than the 58ksi frequently mentioned as the pressure for the 6.8.
Further, the 40mm case length may rule out some long-nosed bullets.
It does, however, have more the look of a classic military cartridge.
Further, the 40mm case length may rule out some long-nosed bullets.
It does, however, have more the look of a classic military cartridge.