Some of what I have seen seems to depend upon the newest "craze" for lack of a better word. for a while a half stock was a Hawken and one did not have a ML rifle that was worth anything unless it was a Hawken. I remember when the Northwest Trade Gun interest developed and everyone weemed to have to have a NWTG. Then pretty soon those wanting to be "different" built or acquired the Tulle Fusil de chasse. Now we have various fowlers also coming out of this interest. During our local NWTG phase I bought a Brown Bess and then built a 12 bore musket. They almost wanted to ban me as not being PC from smoothbore shoots.
When one compares carrying a fowler to a rifle, it is understandable how a person may want to hunt with one. A heavy built smooth rifle, for modern uses may not appeal to many as it carries like a rifle and shoots like a fowler. As I stated, my in progress smooth rifle is using a fowler barrel and will be as light as most fowlers, but it is a bastardized version. It does however use a smaller and maybe faster rifle lock. Still, the ability to shoot the round ball with a good set of sights appeals to me, as does the ability to shoot a few squirrels and ruffed grouse with it using shot. Really, if one bought a pair of Colerain matched barrels, one rifled and one smooth, it would be little problem to make an interchangeable barrel system for either a fowler or smooth rifle, but I question the need of a rifled barrel for my round ball uses in woods where 50 yards is a longer shot. Building a two barrel smooth rifle would be another interesting way to spend an extra $200.
DP