Between smoothbore and twisted rifling

[sethwyo]

A lot of reproductions available of smooth bores, and also rifles,
that is twisted rifling,

But where are the muzzleloaders that have straight grooves that were not twisted as we know rifling today?

These had to have been in use for some time, before someone decided to twist the rifling, there are a heap of people who enjoy their smooth bores but nobody seems to have a muzzleloader with straight rifling

 

[ronaldrothb49]

You can get a straight rifled barrel from FCI Barrels if you want one.

 

[sethwyo]

You can get a straight rifled barrel from FCI Barrels if you want one.

Thank you for sharing