mlg,
Tikka and Sako barrels are all made in the same room, on the same machinery in the same factory in Riihimaki, Finland. They're all made the same way, including lapping the bores of heavy-contour barrels to make them smoother AND extremely consistent in diameter. There is no difference in the barrels put on Tikka and Sako rifles. If that's what you mean by "the barrels come out of the same box on the assembly line," then you're right. However, I didn't see any in boxes. Instead they were on racks, and moved around mostly by automated machinery.
There ya go straight from the horse's ....um. Mouth
Jerry
