<<Je feiner der Damast werden soll, desto dnner muss das gedrehte Band seyn; daher knnen dicke Lufe (Bchsenlufe) nur mit einer Hlse gemacht werden.>>

I find this most interesting as it points to the fact that at this juncture in time there was a somewhat different method for making pattern welded tubes(Bchsenlufe) that were destined to be rifled.

Cheers,

Raimey
rse