Pipe packing is basically a 3-step process:
Sprinkle the tobacco loosely into the pipe until it fills up to the brim. Sprinkling loosely is a concept that escapes even the experienced pipe smokers. Sprinkle loosely until the bowl is full, then press it down until the bowl is half full. If you have a tapered bowl, you may wish to press down the tobacco two-thirds full. At this point, draw on the pipe. There should be little, if any, resistance.
Sprinkle loosely again until the bowl is full. Press the tobacco down evenly until the bowl is three-fourths full. Again, draw on the pipe. There should be a little resistance.
Sprinkle loosely once more until the bowl is full and then round up the top so a little mound of tobacco rests over the bowl. The mound should be less than a half inch tall and nicely rounded. Now press down the tobacco flat, and even with the brim of the bowl. Last time, draw on the pipe. Again, there should be a little resistance. The pipe is now ready for lighting.