Hodgdon Powder Company · Extruded
IMR 4955
Enduron-series temperature-insensitive extruded powder with a copper fouling reducer additive.
- Manufacturer
- IMR
- Grain shape
- Extruded
- Burn rank
- #65
- Category
- Medium-Slow
- Temp sensitivity
- Low
- Application
- Rifle
- Origin
- USA
- Status
- Discontinued
Burn-rate position
FastestSlowest
Typical cartridges
6.5 PRC, 6.5 Creedmoor, .30-06 Springfield, 7mm Remington Magnum, .270 Winchester, .300 WSM
Substitutes
Listed substitutions with charge guidance. Always start at published minimums and work up.
H4831SC · Hodgdon Published
ADI-based; similar burn rate to H4831SC. Start low and work up.
By cartridge
6.5 PRC also used: N550, N555, StaBALL Match
6.5 Creedmoor also used: IMR 3031, N135, N550
.30-06 Springfield also used: N110, Winchester 748, N530
7mm Remington Magnum also used: Superperformance, D072.5, IMR 4320
.270 Winchester also used: Reload Swiss RS60, Winchester 760, S243
.300 WSM also used: N550, N555, Alliant Reloader 16
Similar burn rate
Supply & handling
- Availability (US)
- Common
- Shortage-prone
- No
- Suppressor-friendly
- Yes
- Flash-suppressed
- No
About this powder
IMR 4955 is an Enduron series powder bridging IMR 4831 and the very slowest IMR powders. Its temperature stability makes it an excellent hunting choice for .300 Win Mag and 7mm Rem Mag where shots may span cold morning to hot afternoon conditions. Copper Fouling Eraser additive extends barrel cleaning intervals.
Sources & provenance
- Manufacturer IMR — IMR — published load/burn-rate data archived