Hornady InterLock Rifle Bullets 25 Caliber .257 117 Grain Boat Tail Spire Point. These bullets are built with a solid boat-tail point that acts as a platform for high ballistic coefficient resulting in the ultimate energy retention and penetration. A boat tail causes the projectile to expand rapidly and the InterLock ring system keeps the core and jacket of the bullet locked together during expansion. These result in a larger wound channel and a better chance for one-shot kills on tough game. These 25 caliber bullets are built to meet the needs of high volume big game hunters. If you are a serious hunter you need to try these bullets at least once. Specifications for Hornady InterLock Rifle Bullets 25 Caliber .257 117 Grain Boat Tail Spire Point: Manufacturer: Hornady Bullet Type: Boat Tail Spire Point Bullet Weight: 117 grain Projectile Caliber: .25 Caliber Sectional Density: 0.253 Bullet Quantity: 100 Bullet Fabric/Material: Copper Package Contents: Hornady InterLock 25 Caliber .257 117 GR Boat Tail Spire Point 100 Box Hornady 2552 InterLock 25 Caliber .257 117 GR Boat Tail Spire Point 100 Box