There is a fairly detailed explanation, including diagrams, of many of these questions in WW Greener's book "The Gun". Whether it was the improvement of barrel straightening using Parson's 1795 introduction of the wire inside the barrel method or using indirect light and tissue the descriptions are quite good. Rough and fine boring bits and the use of paper in the bit to adjust the diameter are explained with sketches. A choke boring bit is also shown and the various choke methods discussed. Even though the first version was published in 1881 he updated the next 8 editions up to 1910.
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