Description
Somchem S341 is a versatile propellant powder specifically designed for rifle applications, characterized by a medium burn rate of 2.5. This makes it ideally suited for cartridges requiring efficient energy transfer and consistent performance across a range of calibers. The physical form of S341 is a spherical powder, which offers excellent metering properties through various dispensing systems, ensuring precise and repeatable charge weights—critical for competitive shooting and precision reloading. Renowned for its temperature stability, S341 delivers reliable performance in varying environmental conditions, maintaining consistent pressures and velocities even in extreme temperatures. This quality is particularly advantageous for hunters and shooters who require dependable ammunition performance in diverse climates. Commonly paired with popular calibers such as .308 Winchester and .30-06 Springfield, S341 provides handloaders with the flexibility to fine-tune their ammunition for both accuracy and velocity. Its consistent burn characteristics offer a forgiving margin during load development, allowing reloaders to achieve peak performance with carefully tailored loads. Somchem's reputation within the handloading community further solidifies S341 as a top choice for those seeking reliability and precision in their reloading endeavors.
Specifications
Burn Rate
4.8 (Medium)
Bulk Density
0.990 g/cm³
Density
1.620 g/cm³
Temperature Sensitivity
Low
Suitable Substitutes
Powders with a similar burn rate that may be suitable alternatives (also see burn rate chart):
Standard Loads — Somchem S341
Verified load data combinations using Somchem S341.
.20 BR
Berger .204 | 40gr | Berger Varmint 40gr
.20 BR
Berger .204 | 55gr | Berger Varmint 55gr
.20 BR
Hornady .204 | 40gr | Hornady V-MAX 40gr
.20 BR
Hornady .204 | 45gr | Hornady SP 45gr
.20 BR
Nosler .204 | 40gr | Nosler Ballistic Tip Varmint 40gr
.20 BR
Sierra .204 | 39gr | Sierra Tipped VarmintKing 39gr
.20 BR
Speer .204 | 39gr | Speer TNT 39gr
.20 Nosler
Hornady .204 | 45gr | Hornady SP 45gr
.204 Ruger
Berger .204 | 55gr | Berger Varmint 55gr
.204 Ruger
Hornady .204 | 45gr | Hornady SP 45gr
.22 ARC
Barnes .224 | 77gr | Barnes LRX BT 77gr
.22 ARC
Berger .224 | 77gr | Berger OTM Tactical 77gr
.22 ARC
Berger .224 | 80gr | Berger VLD Target 80gr
.22 ARC
Berger .224 | 80.5gr | Berger Fullbore Target 80.5gr
.22 ARC
Hornady .224 | 75gr | Hornady Match 75gr
.22 ARC
Hornady .224 | 75gr | Hornady ELD Match 75gr
.22 ARC
Hornady .224 | 77gr | Hornady AEROMATCH 77gr
.22 ARC
Hornady .224 | 80gr | Hornady ELD-X 80gr
Subsonic Loads — Somchem S341
Verified subsonic load data combinations using Somchem S341.
.30-06 Spring.
Berger .308 | 230gr | Berger Hybrid Target 230gr
.30-06 Spring.
Berger .308 | 230gr | Berger Hybrid OTM Tactical 230gr
.30-06 Spring.
Discreet Ballistics .308 | 188gr | Discreet Ballistics Selous Machined Expander 188gr
.30-06 Spring.
Hornady .308 | 175gr | Hornady Sub-X 175gr
.30-06 Spring.
Hornady .308 | 190gr | Hornady Sub-X 190gr
.30-06 Spring.
Lapua .308 | 200gr | Lapua Subsonic 200gr
.30-06 Spring.
MAKER .308 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets 200gr
.30-06 Spring.
MAKER .308 | 220gr | MAKER 300 blackout 220gr
.30-06 Spring.
Peregrine .308 | 155gr | Peregrine Subsonic 155gr
.30-06 Spring.
Reichenberg .308 | 154gr | Reichenberg HDB Subsonic 154gr
.30-06 Spring.
Reichenberg .308 | 200gr | Reichenberg Subsonic 200gr
.30-06 Spring.
Sierra .308 | 220gr | Sierra MatchKing 220gr
.30-06 Spring.
Styria Arms | AERO .308 | 95gr | AERO SUB-I,- smax:11.30 95gr
.30-06 Spring.
Styria Arms | AERO .308 | 115gr | AERO SUB,- smax:11.40 115gr
.30-06 Spring.
Styria Arms | AERO .308 | 190gr | AERO SUB,- smax:23.90 190gr
.308 Win.
Discreet Ballistics .308 | 188gr | Discreet Ballistics Selous Machined Expander 188gr
.308 Win.
Hornady .308 | 175gr | Hornady Sub-X 175gr
.308 Win.
Hornady .308 | 190gr | Hornady Sub-X 190gr
Community Loads — Somchem S341
Sample load data calculated with Somchem S341.
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| Cartridge | Bullet | Barrel (in) | Charge (gr) | OAL (in) | Case Volume (GoW) | Max. Pressure (psi) | Muzzle Velocity (fps) |
|---|---|---|---|---|---|---|---|
| .224 | 45gr | Rhino Solid Shank | 25.0 | 36.0 | 2.35 | 43.5 | 47,630 (81%) | 3625 | |
| .224 | 55gr | Barnes TTSX BT | 25.0 | 35.0 | 2.35 | 43.5 | 54,549 (93%) | 3501 | |
| .224 | 45gr | Rhino Solid Shank | 25.0 | 34.0 | 2.35 | 43.5 | 41,205 (70%) | 3465 | |
| .308 | 165gr | Hornady SST InterLock | 26.4 | ••.• | 3.20 | 68.2 | 58,500 (100%) | 2844 | |
| .308 | 183gr | Peregrine VLR-4 | 26.4 | ••.• | 3.34 | 68.2 | 61,076 (104%) | 2740 | |
| .308 | 183gr | Peregrine VLR-4 | 26.4 | ••.• | 3.34 | 68.2 | 59,234 (101%) | 2720 | |
| .308 | 168gr | Barnes TTSX BT | 24.0 | ••.• | 2.68 | 52.5 | 53,345 (101%) | 2546 | |
| .308 | 168gr | Barnes TTSX BT | 24.0 | ••.• | 2.60 | 52.5 | 52,808 (100%) | 2520 | |
| .308 | 165gr | Nosler Partition | 24.0 | ••.• | 2.68 | 52.5 | 43,062 (81%) | 2461 | |
| .311 | 174gr | Sierra HPBT MatchKing | 23.6 | ••.• | 3.08 | 56.0 | 39,552 (75%) | 2411 | |
| .311 | 180gr | Sellier & Bellot FMJ | 15.0 | ••.• | 3.07 | 56.0 | 36,622 (69%) | 2031 | |
| .308 | 150gr | Nosler AccuBond | 20.0 | ••.• | 2.80 | 56.0 | 56,550 (94%) | 2717 | |
| .308 | 150gr | Barnes TTSX BT | 20.0 | ••.• | 2.80 | 56.0 | 56,898 (95%) | 2707 | |
| .308 | 175gr | Lapua MaxRange Target OTM | 24.0 | ••.• | 2.80 | 56.0 | 59,886 (99%) | 2657 | |
| .308 | 175gr | Lapua MaxRange Target OTM | 26.0 | ••.• | 2.80 | 56.0 | 56,043 (93%) | 2648 | |
| .308 | 165gr | Hornady SST InterLock | 20.0 | ••.• | 2.80 | 56.0 | 56,840 (94%) | 2598 | |
| .308 | 150gr | Hornady SP | 24.0 | ••.• | 2.80 | 56.0 | 39,175 (65%) | 2556 | |
| .308 | 175gr | Lapua MaxRange Target OTM | 26.0 | ••.• | 2.80 | 56.0 | 48,486 (81%) | 2543 |
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