They already did -

Barrel Twist Rate:
243 Win - 1 in 7" (17.78 cm)
22-250 Rem - 1 in 8" (20.32 cm)
6.5 Creed - 1 in 8" (20.32 cm)
6mm Creed - 1 in 7" (17.78 cm)
7mm-08 Rem - 1 in 8" (20.32 cm)
308 Win - 1 in 10" (25.4 cm)
25-06 Rem - 1 in 9" (22.86 cm)
270 Win - 1 in 10" (25.4 cm)
30-06 Sprg - 1 in 10" (25.4 cm)
6.5x55 Swe - 1 in 8" (20.32 cm)