Re: .300 Winchester Magum Bullet Choice - Expanded
I had been using 180 grains Barnes TSX since it first came out and the factory published BC of .552 is right on for my rifle. My rifle is the Winchester Model 70 Laredo chambered for 300 Winchester Magnum. My average velocity on this rifle is 3050 fps. I have a drop chart for 5000 ft. elevation and the effective ballistic coefficient for this bullet is .676 on a temperature of 68 degrees. Prior to switching, I was using Hornady 180 grain SPBT at 2975 fps. The Barnes will shoot the same point of impact but 3.5 inches higher than Hornady at 100 yards. The accuracy was about the same so the switch was easy.
To achieve the maximum possible accuracy, all variables must be remove or at least minimize.