Welcome to the forum mike.
If you would tell us what rifle and what powder you are shooting it would help, I can think of several possibilities you may be creating the problem with what you are using if its a traditional. If its an inline and you are using 777 the best answer to bad crud ring is to switch to Blackhorn or pyrodex. If yo have a high quality inline with a well designed breach plug like a TC you can shoot 10 or 12 shots then clean the carbon out of the breach plug with a 1/8 inch drill and go right on shooting. If that's the case we can tell you a mod that will let you shoot all after noon with out doing anything but loading and shooting. Some brands require the mod just to fire Blackhorn consistently.