Vihtavuori Smokeless Powder is used by the some of the best shooters and manufacturers in the competitive shooting industry, they have gained an excellent reputation for being one of the best smokeless powders available. Vihtavuori Smokeless Powder is manufactured by highly qualified employees of EURENCO Vihtavuori Oy in Laukaa, Finland. All of these powders ensure clean burning and repeatable shooting properties in all weathers and conditions. Vihtavuori Smokeless Powders are credited with uniform and superb quality based on full control of the whole production chain beginning from the production of nitrocellulose to the bottling of the end product. These strict quality acceptance limits have helped reloaders and cartridge manufacturers to achieve similar loads regardless of the production lot for more than 85 years. It is easy to see why Vihtavuori Smokeless Powders have achieved a strong position among top class shooters around the world The N100 series powders are single base powders used mainly in rifle calibers. There are ten N100 series powders with different burning rates and suitability from the .17 Remington up to the .458 Winchester Magnum and two special powders for .50 BMG Other Important Information: Do not exceed the loads displayed in the reloaders guide. Never mix any two powders regardless of type, brand, or source. Never substitute any smokeless powder for Black Powder or any Black Powder substitute.