Description
Somchem S121 is a versatile propellant with a medium burn rate, classified at 8.7, making it highly suitable for developing handgun and pistol loads. This powder is designed to accommodate a wide range of common pistol calibers, offering consistent performance particularly in calibers such as 9mm Luger, .45 ACP, and .38 Special. Its granular physical form ensures excellent metering properties, allowing for precise charge weights in automated and manual dispensing systems. S121 exhibits commendable temperature stability, maintaining reliable ballistic performance across diverse environmental conditions, which is advantageous for shooters seeking consistent results regardless of weather variations. Handloaders will find S121 conducive to finely tuned load development, with a balance between pressure and velocity that facilitates precision and reliability. Its stable ignition characteristics also minimize variation, reducing shot-to-shot inconsistencies. Somchem's reputation for quality and dependability is well-regarded within the handloading community, making S121 a preferred choice for those seeking consistent, high-quality ammunition tailored for handgun applications.
Specifications
Burn Rate
9.4 (Fast)
Bulk Density
0.960 g/cm³
Density
1.570 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 S121
Verified load data combinations using Somchem S121.
Subsonic Loads — Somchem S121
Verified subsonic load data combinations using Somchem S121.
.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
.300 AAC Blackout
Barnes .308 | 180gr | Barnes MRX BT 180gr
.300 AAC Blackout
Discreet Ballistics .308 | 188gr | Discreet Ballistics Selous Machined Expander 188gr
.300 AAC Blackout
Hornady .308 | 175gr | Hornady Sub-X 175gr
.300 AAC Blackout
MAKER .308 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets 200gr
.300 AAC Blackout
Nosler .308 | 180gr | Nosler Ballistic Silver Tip 180gr
.300 AAC Blackout
Peregrine .308 | 183gr | Peregrine VLR-4 183gr
.300 AAC Blackout
Reichenberg .308 | 154gr | Reichenberg HDB Subsonic 154gr
.300 AAC Blackout
Sierra .308 | 220gr | Sierra MatchKing 220gr
.300 AAC Blackout
Styria Arms | AERO .308 | 95gr | AERO SUB-I,- smax:11.30 95gr
.300 AAC Blackout
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
.308 Win.
Lapua .308 | 200gr | Lapua Subsonic 200gr
.308 Win.
MAKER .308 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets 200gr
.308 Win.
MAKER .308 | 220gr | MAKER 300 blackout 220gr
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