Mobuck,
Nothing magical about them, they just were never designed to be limited by a 1:10 twist. Hornady ELDX 103 grain bullet has a BC of .513, the Berger 105 Hunting VLD is .532 BC and both require a 1:8 twist minimum. They simply buck the wind better due to their design.
The best BC bullet that stabilizes in a 1:10 twist is a Sierra TGK 90 grain with a .490 BC and the best 100 grain again Sierra GK at .430 BC. Most BTSP hunting bullets for the .243 Win have a low .400 BC, and most around 90-95 grains are only around .350-.380 BC. So to put it simply they are just affected by the wind more.
Plus there is the fact that I may just shoot 100 grain bullets if that is what the rifle likes. I just don't have to limit my options by sticking to a 1:10 twist rifle. Bullet lengths only seem to be getting longer across the board, I don't see that trend reversing soon.
Nothing magical about them, they just were never designed to be limited by a 1:10 twist. Hornady ELDX 103 grain bullet has a BC of .513, the Berger 105 Hunting VLD is .532 BC and both require a 1:8 twist minimum. They simply buck the wind better due to their design.
The best BC bullet that stabilizes in a 1:10 twist is a Sierra TGK 90 grain with a .490 BC and the best 100 grain again Sierra GK at .430 BC. Most BTSP hunting bullets for the .243 Win have a low .400 BC, and most around 90-95 grains are only around .350-.380 BC. So to put it simply they are just affected by the wind more.
Plus there is the fact that I may just shoot 100 grain bullets if that is what the rifle likes. I just don't have to limit my options by sticking to a 1:10 twist rifle. Bullet lengths only seem to be getting longer across the board, I don't see that trend reversing soon.