You can get Savage drop-in barrels with a 1:8 Twist in .243 for the Savage from Shilen or McGowan. I have one of the Shilen barrels, but I'm waiting for stock for the rifle to get here before I can shoot it. Prices for the barrels run in the $300 and up range. You're not going to find a factory rifle with that fast a twist. Standard is 1:10. Savage has a non-standard factory twist of 1:9.25.