Winchest Supreme 780. The Hodgdon website has data. May or may not be the same powder? Use at your own risk. My Speer #8 reloading manual (published June 1970) lists the following .30/06 loads with 780-BR powder and a 150 grain Speer spitzer: 64.0 2908 ft/sec 62.0 2812 60.0 2722 The primer used was a CCI 250 Magnum, cases were "Government Issue" and the test rifle was a Springfield with a 24" barrel. This vintage manual is know to list maximum loads that are dangerously overpressure.