Vihtavuori 3N37 4lb Gun Powder 1.4C, UN0509

This reloading powder was originally developed for .22 rimfire cartridges but has proven to be very versatile and desirable within all competitive handgun shooting disciplines. The burning speed of this small grain gun powder is near to N350 and Vectan A0. Reloading data available for all popular handgun cartridges.

Click Here for Burn Rates (PDF)