Although I have not loaded it, the Speer Manual #14 on page 459, lists 168 grain match bullets (I know you said 150 grain) using a start charge of 41.0 grains of BL-C(2) and 45.0 grains max. There is a footnote which denotes BL-C(2) as one of the propellants suitable for gas-operated semi-auto match rifles. In addition it lists a magnum primer for this combination.

HTH

Stu