What can I substitute for IMR 4350?

Substitutes listed for IMR 4350: H4350. Always start at published minimum charges and work up — substitution is a starting point, not a 1:1 swap.

Is IMR 4350 good for .243 Winchester?

IMR 4350 is commonly listed for .243 Winchester (burn-rate rank #67). Other powders reloaders use for .243 Winchester include N530, Accurate 2520, RS52. Verify charges against a published load manual.

Is IMR 4350 good for .30-06 Springfield?

IMR 4350 is commonly listed for .30-06 Springfield (burn-rate rank #67). Other powders reloaders use for .30-06 Springfield include N110, Winchester 748, N530. Verify charges against a published load manual.

Is IMR 4350 good for .308 Winchester?

IMR 4350 is commonly listed for .308 Winchester (burn-rate rank #67). Other powders reloaders use for .308 Winchester include N110, Shooters World Economy Rifle, Accurate 2230. Verify charges against a published load manual.

Lindcott Armory

Hodgdon Powder Company · Extruded

IMR 4350

Classic slow-medium IMR extruded powder from the original Du Pont family.

Also known as IMR4350

Manufacturer: IMR
Grain shape: Extruded
Burn rank: #67
Category: Rifle Medium
Temp sensitivity: Moderate
Application: Rifle
Origin: USA
Status: Active

Burn-rate position

FastestSlowest

Rank #67 on the burn-rate scale · Rifle Medium

Typical cartridges

.243 Winchester, .30-06 Springfield, .308 Winchester, .270 Winchester, 7mm-08 Remington

Substitutes

Listed substitutions with charge guidance. Always start at published minimums and work up.

H4350 · Hodgdon Published

Similar application range but not identical. Start at lowest published charge for the target powder and work up. H4350 tends to be slightly slower.

By cartridge

.243 Winchester also used: N530, Accurate 2520, RS52

.30-06 Springfield also used: N110, Winchester 748, N530

.308 Winchester also used: N110, Shooters World Economy Rifle, Accurate 2230

.270 Winchester also used: Reload Swiss RS60, Winchester 760, S243

7mm-08 Remington also used: IMR 3031, N135, N550

Similar burn rate

#66Norma MRPNorma #66Vihtavuori N150Vihtavuori #66H4350Hodgdon #68S355Somchem #68IMR 4451IMR

Supply & handling

Availability (US): Common
Shortage-prone: No
Suppressor-friendly: Yes
Flash-suppressed: No

About this powder

IMR 4350 is one of the most historically significant American rifle powders — widely used for decades in hunting and target applications. Note: IMR 4350 burns slightly slower than Hodgdon H4350 despite the similar name, and they are NOT interchangeable without load data verification. Classic choice for .270 Win, .30-06, and belted magnums.

Head-to-headIMR 4350 vs H4350 ChartSee it on the burn-rate spectrum BrowseEvery powder, ranked by burn rate

Sources & provenance

Manufacturer IMR — IMR — published load/burn-rate data archived