The pipe is really good, because you can get the exact bore size that you want. It's a well made very accurate marker.
If you want the boomstick to be as accurate you need to get different back sizes. If the paint you use dosn't match your boomstick, then it's no more accurate than any other barrel.
yes i own both.
I use the boomstick if the paint matches, and the pipe when i can't match it to my boomstick.