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The Speer Grand Slam 1643 is a 175-grain .284 diameter soft point built for handloaders chasing the biggest game animals in North America and beyond. This is a premium hunting projectile that has earned its reputation over decades in the field, and the reason comes down to how it's put together. Grand Slam uses a two-core design: a tough rear core made from 5% antimony lead that resists deformation, and a softer front core locked in at the base. That combination lets the nose open up reliably while the rear holds together to drive deep.
Speer builds these with their Hot-Cor process, where molten lead is poured directly into the jacket so the core bonds tightly to the surrounding copper. The jacket itself is precision-drawn and tapered, running thicker through the critical shank area and profiling down toward a fluted tip. Those internal flutes are what give you symmetrical, controlled expansion across a wide range of impact velocities, whether you're loading a mild 7mm cartridge or pushing a fast magnum. The result is a bullet that retains most of its weight and keeps penetrating when it hits heavy bone.
With a G1 ballistic coefficient of 0.436, a sectional density of 0.310, and an overall length of 1.290 inches, this 175-grain pill works well across the 7mm family, from the 7mm-08 and .280 Remington up through the 7mm Remington Magnum. The long ogive nose profile helps flatten trajectories out at distance, and the cannelure gives you a solid crimp point for heavy-recoiling rifles while adding extra grip to hold the core during expansion. It's a protected point design, so the extended jacket helps shield the tip from dings during handling and feeding.
This is component bullets only, not loaded ammunition, sold 50 projectiles to the box. If you reload for an elk, moose, or plains game rifle and you want a bullet that gets there in one piece, the Grand Slam is a proven choice.
These are component bullets only, not loaded cartridges. They're meant for handloaders who assemble their own ammunition. You'll need brass, primers, and powder to build a complete round.
This .284 diameter, 175-grain bullet works across the 7mm family, including the 7mm-08, .280 Remington, .284 Winchester, and 7mm Remington Magnum. Always work up your loads using current published reloading data for your specific cartridge and rifle. The cannelure gives you a convenient crimp groove for heavy-recoil magnums.
The Grand Slam is a premium big game bullet designed to punch through thick hide and heavy bone while retaining most of its weight. It's a solid pick for elk, moose, and larger deer, and it has a long track record on North American game as well as African plains game. The dual-core construction is what makes it hold together on tough animals.
Speer uses a two-core design paired with their Hot-Cor process, where molten lead is bonded directly to the jacket. Internal flutes at the tip open the nose for consistent expansion while the tough rear core keeps driving for deep penetration. That's why it retains high weight even after hitting bone.
| UPC | 076683016430 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 1643 |
| Bullet Caliber | 7mm |
| Caliber/Gauge | 284 Caliber |
| Grains | 175 |
| Quantity | 50 Per Box |
| Shipping Weight | 1.3625 |
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