Is S133 good for 5.56x45mm NATO?

S133 is commonly listed for 5.56x45mm NATO (burn-rate rank #40). Other powders reloaders use for 5.56x45mm NATO include Norma R1, Shooters World Economy Rifle, Lovex S010. Verify charges against a published load manual.

Is S133 good for .223 Remington?

S133 is commonly listed for .223 Remington (burn-rate rank #40). Other powders reloaders use for .223 Remington include Alliant Unique, AR 2205, A0. Verify charges against a published load manual.

Is S133 good for .22-250 Remington?

S133 is commonly listed for .22-250 Remington (burn-rate rank #40). Other powders reloaders use for .22-250 Remington include Power Pro Varmint, RS40, Ramshot X-Terminator. Verify charges against a published load manual.

Lindcott Armory

Somchem · Ball

S133

Fast Somchem rifle ball powder.

Manufacturer: Somchem
Grain shape: Ball
Burn rank: #40
Category: Medium-Fast
Temp sensitivity: Low
Application: Rifle
Origin: South Africa
Status: Active

Burn-rate position

FastestSlowest

Rank #40 on the burn-rate scale · Medium-Fast

Typical cartridges

5.56x45mm NATO, .223 Remington, .22-250 Remington

By cartridge

5.56x45mm NATO also used: Norma R1, Shooters World Economy Rifle, Lovex S010

.223 Remington also used: Alliant Unique, AR 2205, A0

.22-250 Remington also used: Power Pro Varmint, RS40, Ramshot X-Terminator

Similar burn rate

#40Norma R1Norma #40Ramshot X-TerminatorRamshot #40Alliant 2400Alliant #40Vihtavuori 3N38Vihtavuori #40Power Pro VarmintAlliant

Supply & handling

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

About this powder

Somchem S133 is a South African fast rifle ball powder for .223 Rem and similar cases. Used in South African military and competition applications. Very limited US market.

ChartSee it on the burn-rate spectrum BrowseEvery powder, ranked by burn rate

Sources & provenance

Manufacturer Somchem — Somchem — published load/burn-rate data