The Hornady InterLock .25 caliber (.257) 117 grain Boat Tail Spire Point (BTSP) bullet is engineered for consistent ballistic performance and reliable weight retention. Its InterLock ring mechanically locks the lead core to the jacket to reduce core-jacket separation during expansion. The boat-tail profile and the listed G1 ballistic coefficient of 0.391 promote stable flight and retained energy at range. Packaged 100 bullets per box (and 25 boxes per case), this projectile is intended for hunting and precision shooting applications where controlled expansion and mass retention are important.
Key Specifications
- The bullet weight is 117 grains.
- The listed diameter is .257 inches.
- The bullet style is JSP-BT (Jacketed Soft Point – Boat Tail).
- Each box contains 100 bullets.
- There are 25 boxes per case.
- The listed ballistic coefficient (G1) is 0.391.
- The sectional density is 0.253.
- The core material is lead and the jacket material is copper.
- The product features the InterLock ring system to retain core and jacket during expansion.
- The bullet profile is a Boat Tail Spire Point.
Designed around Hornady’s InterLock construction, this 117 gr BTSP offers predictable terminal performance and consistent ballistic behavior for field loads and load development. Its combination of a boat-tail profile, controlled jacket thickness, and the InterLock core retention system makes it a practical choice for shooters who prioritize retained mass, consistent expansion, and stable downrange performance.
