Finally, here is one more consideration: rifling twist rate. This is critical if you appreciate long range potential and precision.

As explained in this twist rate article, today’s most efficient, high B.C., long-range projectiles require faster twist rates than are traditional.

Remington famously missed the boat with a too-slow twist rate (1:12) with its original 244 Remington cartridge in 1955. Forced to increase twist to compete with the 243 Win. (which you can read about here,) Remington reintroduced the 244 Rem. with a 1:9 twist barrel and renamed it the 6mm Remington as it’s known today.

Unfortunately, too little too late, and this round is nearly obsolete. The 6mm Creedmoor may be the final nail in its coffin.

Most 243 Win. and 240 Wby. Mag. rifles come with 1:10 twists, which are not quite quick enough to stabilize today’s longest, highest B.C. bullets.

Hornady recommends 1:9 twist or faster for its 105-grain A-Max and BTHP Match. Hornady’s new 108 ELD-Match needs a twist of 1:8. Hornady rates this projectile with a G1 B.C. of .536. Compare that to traditional 100-grain .243 bullets that top out with B.C. of around .405 and you’ll understand why the faster twist is needed. Other high B.C. bullets a 6mm shooter might consider are:

• Berger 115-grain VLD Hunting (B.C. .568, 1:7 twist)
• Sierra 107-grain MatchKing (B.C. .547, 1:8 twist)
• Sierra 110-grain MatchKing (B.C. .617, 1:7 twist)
• Nosler 107-grain Custom Competition (B.C. .525, 1:8 twist)
• David Tubb DTAC 115-grain Closed Nose (B.C. .590, .620, 1:7 twist)