Part of they key with getting good ignition is to make sure the flash hole is open. Old military drill had the soldier roll the piece to the right when shouldering. What you want is the flash from the priming charge to "shoot" through the open touch hole to the main charge. What you don't want is the touch hole filled with powder from the pan, then it acts more like a fuse with a very noticeable hang. Some experimentation to find the right priming charge is worthwhile. Too much can be as much of a problem as too little.