[NVDave]

I consider drilling holes in a specific spot to be “machining.”

After all, in the machining industry, over half of all the material volume removed in machining operations comes from drilling holes.

[archy]

After all, in the machining industry, over half of all the material volume removed in machining operations comes from drilling holes.

We figured on about that same percentage as tank gunners, too. 63 rounds for the 105mm main gun, around 6000 for the 7.62mm co-ax machinegun.