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.
A relatively slow burning powder ideally suited to many magnum and standard rounds requiring a slow propellant. Works well in applications previously using various 4350's, Reloader 19, and the various 4831's. Ideal applications are 243 Win., 25-06 Rem., 264 Win Mag, 270 Winchester, 7mm Rem. Mag, 30-06 Springfield, 300 Win Mag, 338 Win Mag, 375 H and H, etc.
Big Book Catalog, Issue:67, Page:527
Sinclair, Issue:4A, Page:094