So exactly what can the .300 Win. Mag. do with a fairly light, 150-grain deer bullet? About 3,400 fps, fast enough that, with a good B.C. bullet of .435, its maximum point-blank range is 367 yards with a 100-zero hitting 2.92 inches high. Of course, just as you can shoot heavier, higher B.C. bullets from the .270 Win. and 7mm Rem. Mag., you can step up to 165, 180, 200, even 220-grain projectiles in the 300 Win. Mag. But for comparison purposes here, we’ll stick with the lighter recoiling 150s because they’re so popular with mule deer hunters.