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CCI
The Speer Grand Slam 25 Caliber 120 Grain JSP Bullets are a proven rifle cartridge option for handloaders pursuing medium game. These 257-diameter projectiles have earned their reputation over decades with hunters who need reliable expansion and deep penetration on live animals. The 120-grain weight sits in the middle of the practical range for .25-caliber rifles, balancing velocity retention with structural integrity downrange.
What sets Grand Slam bullets apart is their engineering. Each bullet features a precision-drawn jacket fused to the core through the Hot Cor process, creating a bond that resists separation under the stresses of impact. Internal flutes in the jacket help control and direct expansion in a predictable, symmetrical pattern—meaning you get consistent performance across a range of impact velocities and distances. For reloaders who demand bullets that perform as reliably as they shoot, the jacket-to-core fusion design eliminates the separation issues that can compromise terminal ballistics.
These bullets have been the choice of serious hunters since their introduction in the 1970s, and they remain relevant today because they do one job exceptionally well: deliver controlled expansion with excellent weight retention. Whether you're loading for a .25-06 Remington, .257 Roberts, or another .25-caliber rifle, Grand Slam bullets reward careful hand-loading with dependable accuracy and field-proven knockdown power. They're a practical choice for hunters who understand that bullet selection is as important as shot placement.
| Caliber | 25 Caliber |
| Bullet Weight | 120 Grains |
| Diameter | 257 Diameter |
| Bullet Type | JSP (Jacketed Soft Point) |
| Construction | Hot Cor bonded jacket and core with internal flutes |
The 257-diameter, 120-grain weight is compatible with standard .25-caliber rifle cartridges such as the .25-06 Remington, .257 Roberts, and .25 Winchester Super Short Magnum. Always verify that your specific firearm's chamber matches the cartridge you intend to load, and consult published reloading data for your particular combination.
Yes. The JSP design and Hot Cor bonding process make Grand Slam bullets well-suited for hunting medium-sized game where controlled expansion and weight retention are important for ethical, effective performance.
Hot Cor fuses the jacket to the lead core at the molecular level, which helps prevent jacket-core separation on impact. This fusion, combined with the internal flutes, promotes symmetrical and consistent expansion across a range of impact velocities.
The package quantity is not specified in the available product information. Please check the product listing or contact Bosque Outdoors directly for details on case quantities and bulk options.
CCI
The Speer Grand Slam 25 Caliber 120 Grain JSP Bullets are a proven rifle cartridge option for handloaders pursuing medium game. These 257-diameter projectiles have earned their reputation over decades with hunters who need reliable expansion and deep penetration on live animals. The 120-grain weight sits in the middle of the practical range for .25-caliber rifles, balancing velocity retention with structural integrity downrange.
What sets Grand Slam bullets apart is their engineering. Each bullet features a precision-drawn jacket fused to the core through the Hot Cor process, creating a bond that resists separation under the stresses of impact. Internal flutes in the jacket help control and direct expansion in a predictable, symmetrical pattern—meaning you get consistent performance across a range of impact velocities and distances. For reloaders who demand bullets that perform as reliably as they shoot, the jacket-to-core fusion design eliminates the separation issues that can compromise terminal ballistics.
These bullets have been the choice of serious hunters since their introduction in the 1970s, and they remain relevant today because they do one job exceptionally well: deliver controlled expansion with excellent weight retention. Whether you're loading for a .25-06 Remington, .257 Roberts, or another .25-caliber rifle, Grand Slam bullets reward careful hand-loading with dependable accuracy and field-proven knockdown power. They're a practical choice for hunters who understand that bullet selection is as important as shot placement.
| Caliber | 25 Caliber |
| Bullet Weight | 120 Grains |
| Diameter | 257 Diameter |
| Bullet Type | JSP (Jacketed Soft Point) |
| Construction | Hot Cor bonded jacket and core with internal flutes |
The 257-diameter, 120-grain weight is compatible with standard .25-caliber rifle cartridges such as the .25-06 Remington, .257 Roberts, and .25 Winchester Super Short Magnum. Always verify that your specific firearm's chamber matches the cartridge you intend to load, and consult published reloading data for your particular combination.
Yes. The JSP design and Hot Cor bonding process make Grand Slam bullets well-suited for hunting medium-sized game where controlled expansion and weight retention are important for ethical, effective performance.
Hot Cor fuses the jacket to the lead core at the molecular level, which helps prevent jacket-core separation on impact. This fusion, combined with the internal flutes, promotes symmetrical and consistent expansion across a range of impact velocities.
The package quantity is not specified in the available product information. Please check the product listing or contact Bosque Outdoors directly for details on case quantities and bulk options.
