well if the LB price is the problem maybe we can do some trading :hmm:
im looking for a set of dimascuse twist octigon to round .410 barrels 36 inches long , no choke .
you buy me the barrels and ill buy you the book,,, hows that sound mmmmmmmmmm
no really
putting the barrels together is not the problem though it dose take some time .
first you must mill or grind a spot on both the breach area flat for a couple inches, then lay them on a flat table or bench and take clamps and hold them in place with the muzzle and breach area flat together where you just ground out .
now high temp solder the breeches together and go forward and low temp the muzzles for about an inch . now you regulate the barrels . If your bench was flat they will be parallel. You can uses a laser pointer as Cody has suggested , I used one that was round ,,,, got 2 of them at a gas station rack for next to nothing ,,,, they will role to the bottom of the barrels and lay flat and normally the laser is high enough the beam will not get deflected by the choke .
Then do yourself a favor and do the math, measure the distance to the wall and the distance between the beams both at the muzzle and on the wall . From that you can figure out where they will converge at .
Now once you have that done and 100% sure about all your figures and that the barrels are parallel
Go back and make 2 small spacers to fit between the barrels at even lengths down the barrels .
IE if you take the barrel length and divide by 4 you will come up with 4 points . You have already soldered two of those point so now you will see that at the other 2 points the barrels are not touching. ,, solder in the two spacers at those points, making sure that they are not big enough to get in the way of the ribs when you put them on .
Now remember at this point when ever you apply heat