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
Typical cartridges
.300 Winchester Magnum, .338 Winchester Magnum, 7mm Remington Magnum
By cartridge
.300 Winchester Magnum also used: N550, Superperformance, N555
.338 Winchester Magnum also used: N550, 203-B, N540
7mm Remington Magnum also used: Superperformance, D072.5, IMR 4320
Similar burn rate
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.
Sources & provenance
- Manufacturer Somchem — Somchem — published load/burn-rate data