209 Muzzleloader Primers For Sale. 209 Muzzleloader Primers are a type of shotgun primer that are specifically designed for use in muzzleloading firearms. Muzzleloading firearms are firearms that are loaded through the muzzle, or front of the gun, as opposed to being loaded through a magazine or chamber. 209 Muzzleloader Primers are known for their consistent ignition and hot spark, making them a popular choice among hunters and competitive shooters. 209 Muzzleloader Primers For Sale. They are used to ignite the black powder or other propellant in a muzzleloading firearm, and are designed to have a large sweet spot to allow for a more forgiving ignition compared to smaller primers. 209 Muzzleloader Primers are available from most major ammunition manufacturers, and are widely used in both single-shot and in-line muzzleloading firearms. Overall, the 209 Muzzleloader Primer is a reliable choice for those looking for a high-quality primer for their muzzleloading firearms.