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Speer
If you reload for your .243 Winchester and want bullets that actually stay together when they hit, Speer Grand Slam 100-grain JSP bullets deserve a close look. These have been the go-to for hunters who can't afford bullet failure—they're designed to hold together and deliver deep, reliable expansion when you need it most. The 100-grain weight in .243 is a sensible middle ground for medium game: enough mass to carry energy at distance, but light enough that your rifle's ballistics stay friendly.
What makes Grand Slam different is the engineering underneath. Speer's Hot Cor process fuses the jacket and core together, not just mixed mechanically like cheaper bullets. The jacket itself is tapered and precision-drawn with internal flutes that enhance controlled expansion. The goal is symmetrical, consistent mushrooming—not wild, unpredictable deformation. You get a bullet that expands reliably across a wide velocity range, which matters if you're shooting from a tree stand at 50 yards or across a canyon at 300.
These have been in Speer's lineup since the 1970s for a reason: they work. Hunters who've trusted them know they're not a gamble. You get 50 rounds per box, which gives you enough to load a decent quantity or try them out before committing a full case.
| Caliber | .243 |
| Bullet Weight | 100 grains |
| Bullet Type | JSP (Jacketed Soft Point) |
| Quantity Per Box | 50 |
| Brand | Speer |
| Product Line | Grand Slam |
This weight is suited for hunting medium-sized game with a .243 Winchester. It balances energy retention at distance with practical velocity in typical .243 loads, and the expansion design is built for reliable takedown across normal hunting ranges.
Speer's Hot Cor process fuses the bullet jacket and lead core together using heat, creating a metallurgical bond rather than relying on mechanical retention. This gives the bullet exceptional weight retention during expansion, which is critical for reliable performance on game.
Yes—these are components for handloaders. You'll need a press, dies, powder, primers, and .243 Winchester brass to use them. This box of 50 is meant for your reloading bench, not for direct use in a firearm.
Speer
If you reload for your .243 Winchester and want bullets that actually stay together when they hit, Speer Grand Slam 100-grain JSP bullets deserve a close look. These have been the go-to for hunters who can't afford bullet failure—they're designed to hold together and deliver deep, reliable expansion when you need it most. The 100-grain weight in .243 is a sensible middle ground for medium game: enough mass to carry energy at distance, but light enough that your rifle's ballistics stay friendly.
What makes Grand Slam different is the engineering underneath. Speer's Hot Cor process fuses the jacket and core together, not just mixed mechanically like cheaper bullets. The jacket itself is tapered and precision-drawn with internal flutes that enhance controlled expansion. The goal is symmetrical, consistent mushrooming—not wild, unpredictable deformation. You get a bullet that expands reliably across a wide velocity range, which matters if you're shooting from a tree stand at 50 yards or across a canyon at 300.
These have been in Speer's lineup since the 1970s for a reason: they work. Hunters who've trusted them know they're not a gamble. You get 50 rounds per box, which gives you enough to load a decent quantity or try them out before committing a full case.
| Caliber | .243 |
| Bullet Weight | 100 grains |
| Bullet Type | JSP (Jacketed Soft Point) |
| Quantity Per Box | 50 |
| Brand | Speer |
| Product Line | Grand Slam |
This weight is suited for hunting medium-sized game with a .243 Winchester. It balances energy retention at distance with practical velocity in typical .243 loads, and the expansion design is built for reliable takedown across normal hunting ranges.
Speer's Hot Cor process fuses the bullet jacket and lead core together using heat, creating a metallurgical bond rather than relying on mechanical retention. This gives the bullet exceptional weight retention during expansion, which is critical for reliable performance on game.
Yes—these are components for handloaders. You'll need a press, dies, powder, primers, and .243 Winchester brass to use them. This box of 50 is meant for your reloading bench, not for direct use in a firearm.
