Description Nitro 100 is a fast burning, flattened spherical, double-base shotshell powder that is a clean burning, cost-effective choice. Grain shape is flake. Firearms, trailers, and some accessories are only available for purchase in stores. Each location follows all BATF and individual state/county/city laws to insure the desired product is legal for sale. Any info provided online is subject to change, please go to your local store for more accurate information.