Vihtavuori N340 Smokeless Handgun Powder

Vihtavuori N340 is one of the most versatile powders in the renowned N300 handgun powder series, delivering outstanding performance across everything from recreational target shooting to high-velocity competition and magnum handgun loads. Formerly known as 3N18 , this premium single-base smokeless powder was originally developed for 9 mm and shotshell applications and has earned a reputation as an exceptional all-round choice for handloaders seeking accuracy, clean-burning performance and dependable consistency.

Manufactured in Finland to Vihtavuori's exacting standards, N340 features a fine tubular grain that meters smoothly through powder measures while producing highly consistent charge weights. With a medium burn rate positioned between N330 and N350, it excels in medium to heavy handgun loads and performs particularly well in high-intensity cartridges such as the .357 Magnum, .44 Magnum, .40 S&W and .357 SIG. Its exceptionally clean-burning formulation helps minimise fouling, making it a favourite among competitive shooters and discerning handloaders alike.

Features

• Premium single-base smokeless handgun powder
• Medium burn rate for versatile handgun loading
• Formerly known as Vihtavuori 3N18
• Excellent for medium to heavy high-velocity handgun loads
• Performs exceptionally well in magnum revolver cartridges
• Fine tubular grain for smooth, consistent metering
• Exceptionally clean-burning formulation with minimal residue
• Outstanding lot-to-lot consistency
• Suitable for selected medium and heavy shotshell loads
• Manufactured in Finland to exacting quality standards

Suitable Cartridges

Vihtavuori publishes load data for a wide range of handgun cartridges, including:

• 7.62×25 Tokarev
• 9 mm Luger (9×19)
• 9×21
• 9×23 Winchester
• .357 SIG
• .38 Super Auto
• .38 Special
• .357 Magnum
• .40 S&W
• 10 mm Auto
• .44 S&W Special
• .44 Remington Magnum
• .45 ACP
• .45 Colt

Important Information

Always consult the latest Vihtavuori Reloading Guide or the official Vihtavuori Reloading Data Tool before developing any load. Use only published load data for your specific cartridge, projectile and primer combination, never exceed recommended maximum charges, and always follow recognised safe handloading practices.

Barry & Son recommendation

N340 sits at the heart of the higher-performance Vihtavuori handgun powder range:

• N310 – Ultra-fast for precision target and Bullseye loads
• N320 – Fast-burning all-round target powder
• N330 – Versatile medium-fast powder for target and field loads
• N340 – Medium burn rate for high-velocity service and magnum handgun loads
• 3N37 – Competition powder for IPSC/USPSA Major loads
• 3N38 – Premium powder for maximum Major power factor ammunition