Speer Grand Slam 338 Cal 250 Grain JSP Bullets (338 Diameter)
$30.73
- Capacity-Rounds:
- 50
- Caliber-Gauge:
- 338 Caliber
- Grain:
- 250
- Quantity:
- 50 Per Box
- Bullet Tip Material:
- Lead
- Core Material:
- Lead
- Jacket Material:
- Copper
- Recommended Usage:
- Large Game
- Sectional Density:
- 0.313
- Bullet Diameter:
- 0.338
- Cannelure:
- Yes
- Coefficient:
- 0.431
The Speer Grand Slam 338 caliber 250 grain JSP bullets are a proven choice for reloaders building rifle ammunition for medium to large game hunting. Dating back to the 1970s, these 338 diameter projectiles have earned a reputation among hunters who prioritize bullet toughness and weight retention—two critical factors when taking shots at distances or on game that demands reliable performance. If you're handloading rifle cartridges like the 338 Winchester Magnum or 338 Lapua Magnum, these bullets deliver the kind of consistent expansion and penetration that separates a clean harvest from a wounded animal.
What sets the Grand Slam apart is its internal construction: a tapered, precision-drawn jacket fused to the core through Speer's Hot Cor process, plus internal flutes that promote controlled expansion. This jacket-and-core fusion is designed to expand symmetrically and consistently when it hits bone or muscle, maintaining enough mass to drive deep into the vitals without shattering on impact. The result is the kind of stopping power that serious hunters expect from a premium hunting bullet.
Reloaders appreciate the Grand Slam's track record—decades of field-proven performance mean less guesswork when you're developing loads. Whether you're preparing ammunition for elk, moose, or other large game, the 250 grain weight in 338 diameter offers the ballistic foundation for effective hunting loads. These bullets are built for accuracy and reliability, not marketing hype.
Key Features
- 250 grain weight optimized for 338 caliber rifle cartridges
- Jacket-and-core fusion via Hot Cor process for reliable performance
- Internal flutes promote controlled, symmetrical expansion
- Tapered, precision-drawn jacket for consistent bullet behavior
- Proven design trusted by hunters since the 1970s
Specifications
| Caliber | 338 |
| Bullet Diameter | 338 Diameter |
| Grain Weight | 250 Grain |
| Bullet Type | JSP (Jacketed Soft Point) |
| Brand | Speer |
Frequently Asked Questions
What rifle cartridges are these 338 bullets designed for?
The Speer Grand Slam 338 caliber 250 grain bullets are sized for standard 338 diameter rifle cartridges, including the 338 Winchester Magnum, 338 Lapua Magnum, and other 338 rifle rounds. Always consult your reloading manual and firearm documentation to verify compatibility with your specific cartridge and rifle.
Will these bullets work for hunting large game?
Yes. The 250 grain weight and JSP design of the Grand Slam are intended for hunting applications where controlled expansion and deep penetration are required. The internal flutes and jacket-core fusion are engineered to deliver consistent, symmetrical expansion on impact—the hallmark of a hunting-grade bullet.
Are these bullets factory-loaded ammunition or reloading components?
These are reloading components—projectiles only. You will need to load them into cartridge cases with powder and primers using proper reloading equipment and procedures. Always follow established reloading manuals for your specific cartridge and firearm.
How long have Grand Slam bullets been in production?
The Speer Grand Slam line was introduced in the 1970s and remains in production today, reflecting its enduring reputation for reliability and hunting performance.
