I calculated a barrel for the 16 bore that would give a 10 pound rifle. I am not a big fan of light rifles and I also knew it was going to use 140-150 grains of powder and a 437 gr ball. This close enough to a 50-140 Sharps to let me know I did not want a light rifle.
It is stocked like a Manton and never leaves a mark but it still cam inflict pain if shot off the bench a lot.

Dan