By way of an update, "Indian Accounts" Book B documents about 60 instances of work on the guns of Indigenous people at Bethlehem between July 1749 and March 1753. The work is listed by account (by individual) not as a daily record. The work ranges from "stocking" a gun to "mending" a gun or a gun lock to "straightening" a gun barrel. The word "rifle" is never used. Much of the work would have been done by Bethlehem's smiths rather than by gunsmiths or gun stockers.
Only after Andreas Albrecht arrives in Bethlehem (June 1750) is any "stocking" work recorded--the first work credited to the "Gun Stock Maker" (see below) is August 1750.
An earlier account book (1747-1749) only records two instances of work, each recorded as "mending his gun," and one loan of a gun.
There are two other volumes of "Indian Accounts," both from 1755, but these volumes aren't the same thing as the first ones. They seem to have been kept in Gnadenhütten itself (a mission town of converted Indians). The word "rifle" is used in these account books, though not often: Daniel gets "a new Rifle in Bethlehem" on 19 August 1755, Petrus gets his rifle stocked on 5 October 1755, and Nathaniel gets his rifle "repaired" on 13 October 1755.
The settlement of Gnadenhütten was destroyed by non-Moravian Delawares on 24 November 1755. Eleven white Moravian missionaries were killed.