Description
IMR 4955 is an 8-pound jug of versatile, temperature-stable rifle powder designed for serious reloaders working with magnum cartridges. It’s built for folks who need consistent performance across a wide range of temperatures, from a hot summer day at the range to a cold morning in the field. Since we started carrying it in early 2025, it’s become one of our top-selling powders in its class for good reason.
What Makes It Stand Out
- Temperature Stability: Engineered to deliver consistent velocities and pressures whether you’re shooting in 20°F or 100°F conditions.
- Magnum Cartridge Performance: Specifically formulated for optimal burn rates in popular magnum rifle calibers like .300 Win Mag, 7mm Rem Mag, and .338 Lapua.
- Clean-Burning Formula: Produces minimal fouling, which means less time cleaning and more time shooting between range sessions.
- Versatile Metering: Flows smoothly through powder measures for consistent, repeatable charges, shot after shot.
- Proven Track Record: A trusted choice among competitive shooters and hunters who demand precision and reliability from their handloads.
Tech Specs
| Powder Name | IMR 4955 |
| Container Size | 8 Pounds |
| Powder Type | Extruded (Stick) |
| Primary Use | Magnum Rifle Cartridges |
| Burn Rate | Medium-Slow |
| Weight (measured) | 6.5 oz (container weight for reference) |
| Manufacturer | IMR / Hodgdon |
Common Questions
What are the best starting loads for IMR 4955?
Always consult the latest Hodgdon/IMR reloading data. This powder excels in .300 Win Mag with 180-220 grain bullets, 7mm Rem Mag with 160-175 grain bullets, and .338 Lapua with 250-300 grain bullets. Start low and work up carefully.
How does it handle temperature swings?
It’s formulated for low temperature sensitivity. You’ll see less variation in velocity and point of impact between extreme hot and cold conditions compared to many standard powders, which is critical for long-range consistency.
Is the 8lb jug practical for an average reloader?
If you shoot magnum calibers regularly, the 8lb jug offers significant cost savings per round and ensures you have a consistent lot number for a long time. For occasional use, consider splitting with a trusted shooting partner.
✅ Plain, unmarked packaging
✅ Easy 30-day return policy
✅ 256-bit encrypted checkout
✅ USA-based seller
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