The Sierra GameKing .30 Cal 165g HPBT (Hollow Point Boat Tail) S2140 is a hunting bullet designed for shooters who want a hunting version of the renowned 168 grain MatchKing bullet. Here are some key features and information about this bullet:

1. Design Inspiration: The bullet is modeled after the 168 grain MatchKing bullet, indicating that it incorporates some of the characteristics that make the MatchKing bullets famous for accuracy.
2. Bullet Weight: It has a weight of 165 grains, making it a medium-weight bullet suitable for a variety of applications.
3. Bullet Type: The HPBT design (Hollow Point Boat Tail) is known for offering a good balance between accuracy and terminal performance.
4. Bullet Construction: This bullet is described as “harder” compared to its Spitzer Boat Tail counterpart. The harder construction is intended to provide superior penetration and good expansion on medium-sized game.
5. Recommended Use: The bullet is specifically recommended for shooters of .30 caliber magnum rifles who desire a bullet that will not deform at the point. It’s suitable for medium to large game.
6. Expansion Characteristics: The bullet is designed to expand reliably in medium to large game, but this expansion is optimized when the bullet is driven at a muzzle velocity of 2500 fps (feet per second) or more.
7. Packaging: It comes in a 100 Count Box, providing a convenient quantity for reloaders.
8. Muzzle Velocity Requirement: To achieve optimal expansion, the manufacturer recommends a muzzle velocity of 2500 fps or more. This suggests that the bullet may not perform as intended at lower velocities.

Overall, the Sierra GameKing .30 Cal 165g HPBT S2140 appears to be a well-designed bullet for medium to large game hunting, particularly in .30 caliber magnum rifles. As always, it’s essential to follow the manufacturer’s recommendations for optimal performance.