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Somchem · Extruded

S355

Very slow extruded Somchem powder for magnum rifle cases.

Manufacturer
Somchem
Grain shape
Extruded
Burn rank
#68
Category
Medium-Slow
Temp sensitivity
Low
Application
Rifle
Origin
South Africa
Status
Active

Burn-rate position

FastestSlowest

Rank #68 on the burn-rate scale · Medium-Slow

Typical cartridges

.300 Winchester Magnum7mm Remington Magnum.338 Winchester Magnum

By cartridge

.300 Winchester Magnumalso used: Superperformance, N560, Norma 204
7mm Remington Magnumalso used: Superperformance, D072.5, IMR 4320
.338 Winchester Magnumalso used: Accurate 4350, Norma MRP, Reloader 19

Similar burn rate

#68IMR 4451IMR#68Reloader 19Alliant#68Ramshot Big GameRamshot#67IMR 4350IMR#69H4831SCHodgdon

Supply & handling

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

About this powder

Somchem S355 is a slow South African rifle ball powder for 7mm Rem Mag, .300 Win Mag, and .338 Win Mag. Limited US availability.

ChartSee it on the burn-rate spectrumBrowseEvery powder, ranked by burn rate

Sources & provenance

  • ManufacturerSomchem — Somchem — published load/burn-rate data