To Doverham's point: steel suitable for barrels has a very small range of density, tools to measure striking are now commonly available and cheap, and, we now have the technology readily avaliable to measure weight, balance AND weight distributiion (as MOI). The art is in helping the customer decide what he needs/wants.

To Geno's point: no two pieces of wood have the same density. Therefore, no two stocks of the same dimensions will have the same weight, balance, and weight distribution; good point.

Good understanding, Chuck. You got it as I see it.