Lindcott Armory 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
Substitutes
Listed substitutions with charge guidance. Always start at published minimums and work up.
By cartridge
.270 Winchesteralso used: Reload Swiss RS60, Winchester 760, S243
.30-06 Springfieldalso used: Winchester 748, N530, 5744
.300 WSMalso used: Alliant Reloader 16, Reloader 17, Norma 204
6.5 Creedmooralso used: IMR 3031, N550, Alliant Reloader 15
6.5 PRCalso used: StaBALL Match, Reloader 17, StaBALL 6.5
7mm Remington Magnumalso used: Superperformance, D072.5, IMR 4320
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.