Blacksheep,
You are obviously a highly technical individual, a couple of questions,
1. Lands....are these the raised portions of the rifling (ie the opposite of the groove)? There appears to be no indication of the amount of grooves or is six accepted as the standard?
2. Why is rifling appear by convention to impart a right hand spin although I do believe that some Chinese and Polish weaponds have a left hand spin but these are very much a rareity.