I usually give the same answer: A: "I use standard CCI 209 primers. They have never given me any trouble, but it may depend on what powder and bullet you chose."
Then the next question either goes: Q: "But the Blackhorn 209 site recommends, CCI magnum 209 primers?"
A: "That is true, however I've had the Magnums stick in the bolt nose at lower powder charges and require a dry fire to remove, so I personally stay away from them. If you don't mind dry firing in-order to get the spent primer out of the nose, or you work up to higher charges, you can use them (or any other 209 primer). I've personally had great accuracy and performance with the standard CCI and Blackhorn 209. So I stick with and recommend them."
Or the next question is: Q: "I'm using Pyrodex/TripleSeven/Black powder, I've heard full power primers are too powerful, and will drive the powder down the bore, un-compacting it, and gives inconsistent performance, and poor ignition."
A: "That can happen. I believe its most probable with loose fitting projectiles. I stuck with tight fitting Sabots and standard CCI's and was OK back when I shot TripleSeven. Feel free to follow proper load development practices and experiment with other 209 primers. I myself have always been pleased with standard CCI's."
"So if standard 209's are not giving you the accuracy you want with black powder substitutes other than Blackhorn209, you may want to try the low power "black powder" only primers. I'd try the ones with the same name as the powder you are using. However, understand, that they may stick in the bolt nose and require a dry firing to remove. "
Check out the video below for real world examples of our Remington 209 kit using regular CCI's functioning just fine with Blackhorn 209