I am new to the 209 primers, so I was just wandering if all 209 primers are the same or do different brand primers make your muzzleloaders shot differently.

Some primers are hotter then others, meaning they produce more heat and pressure. Remington Kleenbore Primers and Winchester Triple Seven primers were made to be not as hot when fired. This was made to help combat the crud ring that triple seven can form in a rifle. The other primers are a little hotter, but they all work just fine.

Although if your shooting BlackHorn 209 use the hottest primer you can get your hands on.