Vihtavuori N320 Smokeless Gun Powder: Fast, Clean-Burning Powder for Handgun Loads

Vihtavuori N320 is a fast-burning, porous pistol powder and the second-fastest powder in the N300 series, prized by reloaders for its clean burn and soft-shooting performance across a wide range of handgun cartridges.

Built for Clean, Consistent Handgun Loads

N320 uses a porous tubular grain measuring 1.1mm long and 0.8mm in diameter. Porosity is what drives its fast burn rate, and on Vihtavuori’s own N300-series burn-rate chart, N320 sits just behind Vihtavuori N310 as the second-fastest powder in the lineup. Its porous granule structure meters consistently and burns clean, reducing fouling during high-volume practice and match shooting. Vihtavuori’s production process controls the full chain from nitrocellulose manufacture to final bottling, giving the lot-to-lot consistency competition and Cowboy Action shooters both rely on.

Application Versatility

N320 has official published load data spanning roughly .32 to .45 caliber handgun cartridges, including 7.62×25 Tokarev, 9mm Luger, .38 Super Auto, .38 Special, .357 Magnum, .40 S&W, .44 S&W Special, .44 Remington Magnum, .45 ACP, and .45 Colt. It’s a popular choice among Cowboy Action shooters and is widely used by reloaders who want soft-shooting, consistent handgun loads. If you need a faster-burning N300-series option, Vihtavuori N310 is worth comparing.

Load Development

Always use published, manufacturer-tested load data when developing loads with N320. Start at the published minimum charge and work up in small increments, weigh every charge on a calibrated scale, and chronograph each string to track velocity consistency. Keep primer brand, bullet lot, and brass lot constant during development, watch for pressure signs, and document charge weight, seating depth, primer, and chronograph results so successful loads can be reproduced.

Quick Specs

• Type: Single-base porous tubular pistol powder, N300 series, second-fastest burn rate in the series, 1.1mm x 0.8mm grain
• Manufacturer: Vihtavuori (Finland)
• Best for: 9mm Luger, .38 Special, .357 Magnum, .40 S&W, .44 Magnum, .45 ACP, .45 Colt, and other cartridges from .32 to .45 caliber
• Container sizes: 1 Lb, 4 Lb

Safety Reminders

Before loading, review a few important guidelines. Never exceed the loads displayed in your reloading guide. Never mix two powders together, regardless of type, brand, or source. Never substitute smokeless powder for Black Powder or any Black Powder substitute. Store N320 in its original, sealed container in a cool, dry, well-ventilated place away from sunlight and heat sources.

Vihtavuori N320 For Sale, In Stock

USReloadingPowder keeps Vihtavuori N320 Smokeless Gun Powder in stock for handgun reloaders who want a clean-burning, consistent powder for practice and match loads. Browse the rest of our lineup on the Vihtavuori Powders category page.

FAQs

What cartridges is N320 best for? It has official published load data for cartridges from about .32 to .45 caliber, including 9mm Luger, .38 Special, .357 Magnum, .40 S&W, .44 Magnum, .45 ACP, and .45 Colt.

Where does N320 sit in the N300 series burn rate? N320 is the second-fastest powder in the N300 series, just behind N310.

What container sizes does N320 come in? Vihtavuori N320 is available in 1 Lb and 4 Lb containers.

How should I store it long-term? Keep it sealed in its original container, stored in a cool, dry, ventilated location away from heat and sunlight. Proper storage keeps powder stable for years.