Buy CCI Primers #209 Muzzleloadin Online. CCI Muzzleloading Primers are designed exclusively for the Inline Muzzleloading hunter. CCI continually tests and improves their primers, making them more sensitive, simpler to seat, and more suitable with modern inline muzzleloading rifles. These primers use non-corrosive and mercury-free contemporary initiator mixtures for the cleanest possible burn. Primers produced expressly for muzzleloading rifles are gentler than standard 209 shotshell primers, meaning they do not drive the powder charge forward, hence helping to maintain constant velocities and minimizing the creation of crud rings. These primers are not intended for use in shotshells; they are solely intended for use in muzzleloading rifles.