Pedersoli makes high quality replicas of the Brown Bess and the Charleville Musket. These are made of better materials than the originals. Originals used wrought iron for virtually everything except for brass fittings, springs and frizzen. Modern muskets will at least be steel. And you can shoot one without worrying about some old seam in the barrel opening up.
http://www.davide-pedersoli.com/tipo...rown-bess.html
http://www.davide-pedersoli.com/tipo...arleville.html