Proof Research Tikka T3X 22 Creedmoor Threaded Rifle Barrel Sendero 18 in 8 Twist Pxt 5/8-24 Thread 2.10 Weight Carbon. PXT - PROOF Exponential Twist - is a complete rethinking of conventional rifling geometry and twist progression engineered to reduce engraving force minimize throat erosion and create a smoother transition as the projectile engages the rifling. Specifications for Proof Research Tikka T3X 22 Creedmoor Threaded Rifle Barrel: Manufacturer: Proof Research Caliber: .22 Creedmoor Barrel Twist Rate: 1-8 Firearms Threads Per Inch: 5/8x24 Gun Make: Tikka Gun Model: Tikka T3x Gun Type: Rifle Package Contents: Proof Research Tikka T3X 22Cm Threaded Rifle Barrel What firearm models does the manufacturer say Proof Research Tikka T3X 22 Creedmoor Threaded Rifle Barrel is compatible with? The manufacturer suggests that Proof Research Tikka T3X 22 Creedmoor Threaded Rifle Barrel is compatible with Tikka T3xProof Research 155042: Tikka T3X 22 Creedmoor Threaded Rifle Barrel Sendero 18 in 8 Twist Pxt 5/8-24 Thread 2.10 Weight Carbon