Read pages 283 to 288 of WW Greeners book.
He refers to it as "the use of machinery in gun-making" and "machine-made sporting guns" to differentiate,using the US as an example.
Graeme Greener refers to "hand made" and "guns mostly machine made but hand finished and assembled".
As stated other than the Khyber pass no guns have been made without the use of some machinery.