Leatherbelly's observation is likely the part that makes all the difference. The French trade muskets have an exaggerated pitch...the buttplate slopes in the wrong direction. Consequently, when you fire the piece, the stock wants to climb upward away from the shoulder, and the comb slams hard into your cheek. This aspect of the stock design has been exaggerated in the reproductions of the muskets, and hence, the reputation. The muskets illustrated in the reference material have this feature to some degree, but there are also examples that do not possess the exaggerated pitch. In the stock design, the drop at the comb and at the heel is quite acceptable...it's that pitch that get you. It is also my observation that Centremark for one, makes their muskets with a 14 1/2" lop, and this may be an attempt to get your face further away from that comb.