Vihtavuori 3N37 Smokeless Powder
The Vihtavuori 3N37 is a premium single-base smokeless handgun powder developed for high-performance competition shooting. Originally designed for loading .22 Long Rifle cartridges, 3N37 has evolved into one of Vihtavuori’s most versatile handgun powders. With a burn rate very similar to N350, it delivers outstanding metering, clean burning, and excellent accuracy in a wide range of medium to high-performance pistol cartridges. It has become a favourite among IPSC and USPSA competitors, particularly for 9mm Major loads in Open Division.
Features
- Premium single-base smokeless powder
- Medium-slow burn rate, similar to Vihtavuori N350
- Extremely clean burning with minimal residue
- Fine tubular grain for excellent metering consistency
- Outstanding velocity consistency and accuracy
- Excellent choice for competition and practical shooting
- Suitable for medium to heavy handgun loads
- Manufactured in Finland to strict quality standards
Specifications
| Specification | Details |
|---|---|
| Manufacturer | Vihtavuori |
| Powder Series | N300 |
| Powder Type | Single-base smokeless powder |
| Burn Rate | Medium-Slow (similar to N350) |
| Grain Shape | Fine tubular |
| Primary Application | Competition handgun ammunition |
| Country of Manufacture | Finland |
Popular Cartridges
Vihtavuori publishes pressure-tested data for 3N37 in many popular handgun cartridges, including:
- 9mm Luger (9×19mm)
- .38 Super Auto
- .357 SIG
- .38 Special
- .357 Magnum
- .40 S&W
- .44 Remington Magnum
- .45 ACP
- .454 Casull
Always use Vihtavuori’s official pressure-tested reloading data for your exact cartridge and bullet combination, and begin with the published starting load, working up carefully while observing for pressure signs.




