CCI caps for me. :thumbsup: and I like to stick with Black Powder. Never any problems with that combo. If you are using a substitute powder you may try a musket cap for a really hotter cap. Also make sure your breech area is clean. I use a air line fitting that a rethreaded to screw in to the drum and attach a piece of hose with a weight and toss it into a bucket of warm water. Then I use a jag and wet patch on my ramrod to create a suction and pull the water in and out through the fitting on the drum. This really cleans the drum and breech area quickly. This is the easiest way I have found to clean my caplock rifles.