I can believe that H&H, etc. in fact all the top makers regulated the convergence of their barrels before ribs were finish soldered. Although if assembled correctly there should be no need for this in shotgun barrels. But to assert that bought in Birmingham guns, already finished, were then "shot and regulated" whatever that might mean, is just plain nonsense. That's like believing someone walked on water. Or that confining people to their seats for the last hour will make us safer. I wonder how the airlines will deal with stinking seats
nial