1/9?
Well, maybe. Most of these rifles were made with a 1 in 12" twist. This twist was judged best for the lighter varmint bullets (40-52 gr). Some newer .223 rifles are offered with 1-9" twists. Its best to check the rifle to make sure which one it is to be certain.
1- 12 twist
6mm Remington twist rate is 1 in 9, 244 Remington twist rate is 1 in 12. The 1 in 12 twist will not stabilize long 100 grain bullets while the 1 in 9 twist will.When the the caliber .224 Remington's name was changed to 6mm Remington, the twist rate was changed.
The twist rate is 14"
Rifling imparts spin that stabilizes the projectile. The rate or "twist" determines how much
Standard factory 222 Remington ADL has a 1/14 twist rate.
The Remington 700 ADL in .30-06 Springfield typically features a twist rate of 1:10 inches. This means that the rifling in the barrel makes one complete turn for every 10 inches of barrel length. This twist rate is designed to stabilize a wide range of bullet weights commonly used in .30-06 ammunition, providing good accuracy and performance.
1-12 twist rate
Remington Model 700 bolt action rifles in 7mm Rem. mag. have a 1 in 9 right hand twist (one full turn in nine inches of barrel). This will accomodate bullet weight/length up to 175 grains.
1/10
The rate of twist for a Remington 788 in .243cal is 1 in 9 which is one complete turn of the bullet in nine inches
Most likely 1/14
1 in 12"