The VihtaVuori pistol powders are single base, porous powders that also meter well through most powder measures. This powder has a wide application. Similar in burn rate to Winchester 540 or Herco, there is data for N340 in 30 Luger, 9mm Luger, 9X21mm, .38 S&W, .38 Super, .38 Special, .357 Mag, .44 Mag, .45 ACP, and .45 Long Colt.
Big Book Catalog, Issue:67, Page:527
Sinclair, Issue:4A, Page:094