The .308 Win and the .30 Krag have nearly the same case capacity (about 57 gn) and nearly the same amount of bullet protrusion from the case (about 0.8"). The two will, then, likely be close in pressure. For the .308 Win, Hodgdon lists 14.0 gn of Trail Boss under the 150 gn Nosler BT as 27000 psi with 1400 fps from a 24" barrel.

There are two other interesting low pressure loads in their .308 data, both for a 168 gn Sierra HPBT, namely 8.0 gn of either Titegroup or Clays, both producing about 1060 fps from 24" and about 26000 pressure.