Blackhorn 209 is a low residue, high performance propellant for muzzleloaders and black powder cartridges. This powder consistently delivers higher velocities and remarkable accuracy. With the industry’s lowest standard deviations and a low pressure-to-velocity ratio, you can expect precise results and repeatable results. Multiple shots can be loaded without the inconvenience of swabbing the barrel. Changes in temperature or humidity do not affect performance. Will remain consistent and reliable for an extended period of time if stored properly. Use only standard 209 primers. 10 oz.