The VihtaVuori pistol powders are single base, porous powders that also meter well through most powder measures. This is a very fast powder, with burn rates similar to Bullseye and Accurate No. 2. It has a wide range of handgun applications from 25 ACP to 9mm Luger.
Big Book Catalog, Issue:67, Page:527
Sinclair, Issue:4A, Page:094