The website lists starting and max loads for 6.5-284 and 6.5-06. I’m not sure the case capacity of the 6.5x68, but would one of those starting charges work?
Not exactly, the 6.5x68 has roughly 86 gr H2O while the 6.5-06 or 6.5-284 holds around 66-68 gr H2O.
It should be somewhere between the 264 Win Mag and the 26 Nosler, yet I can't find data for either of those cartridges with IMR 7977, but it fits within the burn rates for other powders listed.
