VihtaVuori is a Finnish Powder Company that has been manufacturing powder since the 1920's. VihtaVuori powders are extremely popular with benchrest shooters, High Power shooters, and varmint hunters.
This multi-purpose powder is used in 22 caliber cartridges with light bullets. Similar burning rate to Hodgdon 110 and 4227.
Big Book Catalog, Issue:67, Page:527
Sinclair, Issue:4B, Page:094