Hi Guys, went out today and shot my new 44 cal revolver. Am not doing something right. Am using #10 caps, when I put them on and try to fire, the first time the hammer strikes, they do nothing, then second time around they fire perfectly. The book says nothing about using #10 or #11 caps and have yet to callPietta, Thought I'd try the one's with experience first

Do I need to seat them more? Or are they the wrong size caps?
They were CCI's by the way. Thanks for the help.