I'd go with the Nosler Accubond or the Swift Scirocco in either the 140 or 150 gr. weight. I load the 145 gr. Speer Grand Slam in mine at 3150 FPS. It's not the most aerodynamic projectile, but it shoots sub MOA in my 1885 Browning that I don't really care that much. Everything has died out to 400 yards.

The lack of planning on your part does not constitute an emergency on my part!