Description
IMR 4831 is a slow-burning, single-base extruded rifle powder designed for magnum cartridges and heavy bullet loads. It’s for the handloader who needs consistent velocity and pressure in large-capacity cases like the .300 Win Mag or 7mm Rem Mag. We started stocking this in late 2024, and it’s become one of our steady sellers for a reason—it delivers.
What Makes It Stand Out
- Extruded Kernel Design: Meters consistently through most powder measures for reliable charge weights.
- Temperature Stability: Maintains predictable burn rates across a wide range of temperatures you’ll encounter in the field.
- Clean-Burning Formula: Leaves minimal residue, making post-range cleaning a simpler task.
- Versatile Application: An excellent choice for a wide range of magnum rifle cartridges and heavy-for-caliber bullet weights.
- Improved Lot Consistency: Our staff has noted that compared to previous versions, the powder tolerances are noticeably tighter from lot to lot.
Tech Specs
| Powder Type | Single-Base Extruded |
| Burn Rate | Slow |
| Container Size | 8 lb Jug |
| Primary Use | Magnum Rifle Cartridges |
| Weight (measured) | 5.7 oz |
| Manufacturer | IMR |
| Country of Origin | Canada |
| Product Code | 4831 |
Common Questions
Is this suitable for .30-06 Springfield loads?
Yes, but it’s best suited for the heavier bullet weights (180 grains and above) in the .30-06 to take full advantage of its slow burn rate. Always consult published load data.
How does it compare to H4831?
They are in a similar burn rate range and often used for the same applications. However, they are different powders from different manufacturers. Always use data specific to IMR 4831 and never substitute directly by weight.
What’s the shelf life on an 8lb jug?
Stored properly in a cool, dry place with the lid sealed tight, this powder will last for decades. The 8lb size is economical for high-volume shooters.
✅ Plain, unmarked packaging
✅ Easy 30-day return policy
✅ 256-bit encrypted checkout
✅ USA-based seller
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