you cant telll from the pics but there are 3 different tapers, just like a 20 lb parrot, I just ajusted teh tailstock over untill my dial indicator read me what i was looking for,.. I was starting to make a 10lb gun, but then i decided to change it to a seacoast, my next version of this gun will be just right,, well not as good as seacoast artillerys but, they are wow, amazing. mine will be a what you call a 20/20 gun. lol
rick bryan