Re: Sierra Gameking for Sheep
My favorite rifle for deer, antelope and sheep hunting is my .257 AI. One of my favorite bullets for this rifle is the 117 gr Sierra GameKing. In the last 30 yrs, I've used this combination to kill a mule or whitetail deer and one or more pronghorn antelope almost every year, and have used it for 5 bighorn rams and one Dall ram. All the sheep were one shot DRT kills.
As was said above, sheep are not hard to kill. With your .300 Win, a 150 or 180 gr GameKing bullet placed in the heart/lungs will easily kill a ram at 400+ yds.