As a retired Biology instructor I never expected to see a discussion on anatomy on the S&W Forum! One never knows what to expect here.
Froggie
Meek's book has 38 pages dealing with anatomy.
What to do correctly and view the example below.
In a conversation with Paul Jaeger, about a 34" slab sided barrel for my No.1H in 458WM decades ago, the only barrel that would finish at 34" was a NavyArms.
No high quality barrels were available.
I planned to engrave a grand staff with an arrangement, part of a popular Beethoven tune, which would make music when drawn from it's mounting.