The only question I would have about using raw wool would be the source. Wool was salable where as tow was a waste product, and there was Spanish moss, grass, worn out cloth ect available.well if you need exact quotes saying "we used wool" you are not likely going to find it and you are being a little pedantic
Why would he bring up wool in the first place and say that felt and soft brown paper were preferable if no one was using it?!
The very way he speaks of it in his writing indicates it was likely a common practice to use wool. Otherwise he is just the idiot talking about a thing no one was doing in the first place.
When looking at historical documents sometimes one must read between the lines and use a little common sense. And I know that it is a rare commodity and all that but just do some simple extrapolation here!
Howsomever we read of Boone buying the best Irish linen for patching. And small shot was sold on the frontier. In terms of cost, killing a deer with a hundred pounds plus of meat cost the same as a rabbit with one pound or a turkey with ten.
So any thing shot with shot was expensive, but they were doing it on the frontier where cost really mattered.
Thus the cost of raw wool might not have been a factor
Just some thoughts.