Sierra GameKing Features The Sierra GameKing Tipped bullet is engineered specifically for today s newer 6.5mm cartridges running a 1 in 8 inch twist rate a specification that stabilizes the bullet s boat tail design for consistent accuracy downrange. The polymer tip initiates expansion quickly on impact while the bullet s thick jacket regulates how far that expansion progresses giving hunters a controlled balance between expansion and penetration. Ballistic coefficients ranging from 0.466 at velocities below 1640 feet per second up to 0.563 above 2115 feet per second show this bullet retains its flight characteristics across a wide velocity window from close range shots out to longer distances. A sectional density of 0.287 further supports the bullet s ability to drive deep into game after expansion begins. This bullet is built to perform across a broad range of game from whitetail deer up through elk and even multiple bear species making it a versatile choice for hunters who pursue different game in a single season. The polymer tipped boat tail design also improves the bullet s aerodynamic efficiency compared to a flat base design helping it retain velocity and energy at extended ranges. At 140 grains and .264 inch diameter this bullet matches the most common bore specification for 6.5mm rifles currently on the market. Handloaders working up hunting loads in 6.5mm cartridges will find the 500-count box offers enough supply to develop test and hunt with the same load across an entire season. Sierra GameKing Specifications Manufacturer: Sierra Model: GameKing Caliber: 6.5mm Bullet Diameter: .264 Bullet Weight: 140 Grain Bullet Type: TGK Bullet Material: Jacketed Lead Bullet Style: Polymer Tipped Boat Tail Sectional Density: 0.287 Ballistic Coefficient (G1): 0.563 Count: 500 Available At: GrabAGun