I have a 410 double and would like to build a set of 22lr barrels. As I want to keep the 410 set I was planning to build the new set from scratch, not from a mono block but attaching the barrels together on a plate with the locking lug.
My worry is how well it will shoot as I plan to turn the barrels off center at breech end to align rim with firing pins, and muzzle end centered. Will this cause some strange stress paterns as the barrels heat up? I realize a 22 will not get very warm but am still not sure. Has any one done this? Is this a problem?

Thanks for any imput.
Dale