Patent ID: 8257522

Claim:
Shaped propellant grains in the form of a propellant charge having a bulk density in the range of 0.550 to 0.750 grams per cubic centimeter, the propellant grains comprising a propellant composition for use in modern in-line muzzleloaders, wherein the propellant composition comprises: a) from about 70 to about 90% by weight of a cellulose-based organic fuel; b) from about 5 to about 30% by weight of a non-azide, nitrogen-containing, solid primary organic oxidizer; and c) from about 0.5% to about 10.0% by weight of a mineral-based secondary nitrate, perchlorate, chlorate or peroxide oxidizer, wherein, when used in said modern in-line muzzleloaders the products of combustion are substantially-completely gaseous, with the proviso that the propellant composition excludes nitroglycerin.