Here's a set of totally authentic late medieval arrows getting made up to be shipped to Canada.
The shafts are lime, and have a strong torpedo taper to keep them as solid as possible. The horn inserts are a lovely blonde cow horn, glued in place with hide glue.
A fletching compound of pine resin, beeswax and copper acetate is mixed up and painted onto the shaftment area, where the long low swan feathers are bound with pure undyed silk.
The feathers are then cut down to the height of the natural grease line (around 1/2") and given a straight triangular profile.