According to Knight the 209's are hotter and more reliable. With pellets that is what they recommend using with their disk rifles, although #11 caps will work. If you want to use #11's they recommend using powder. But not vice versa, i.e.,if you want to use powder in order to customize your load, they still recommend using the 209's.

So it seems from their testing the 209's have the advanage at least with the disc rifles.

cci no#11 mag caps @ loose powder only.

CCI #11 Mag caps seem to work OK for me, but there is no comparison when you introduce the 209 shotgun primer - it is in a different class entirely! In my sidelocks, the 209 will blast a flash of fire right out the muzzle, just like a Large Rifle primer in a centerfire rifle cartridge case!! In addition, I have NOT FOUND musket caps to be any better than #11 CCI Mags.

Larry

209 primers throw 11 times more fire than primers.

(also f.y.i., @ means "at" not "and&quot