I killed probably 150? deer with the 100-grain Interlocks from an old Model 700 6mm. Not sure what the twist was in that. I never have found a rifle that would not shoot an Interlock. The 129 in my go-to for my .260s. I burned out the 6mm and it became a .260.
I think when Remington renamed the 244 Rem to the 6mm Rem in about '63 they changed the twist from a 1-12 to a 1-9 twist.
