sorry wolf hound i have to disagree .
 a muzzleloader is any complete  weapon specifically designed to be loaded from the muzzle.
 any modern cartridge weapon . rifle , shotgun  can be loaded from the muzzle . this does not mean they should be considered a muzzleloader .  does simply breeching a modern center fire make it  a muzzleloader “ with few acceptations ,no . the basic design ,” ignition systems “,   are not nor were they ever based on a muzzleloader design .
 hence they are muzzle loading not a muzzleloader .
 we have stretched this  through the last few years to define  muzzleloaders to be anything capable of only being loaded from the muzzle . 
however  many manufactures still push this legality . savage for instance  had to re design their action  on their smokeless weapon as  the one  originally used  restricted its sale under the FFA.
 without  correcting this problem  the rifle was no longer considered a muzzleloader that was not regulated by the FFA  but  a firearm that was . hence  the term  modern muzzle loading firearm .
 knight also had this problem with the original design of his 85 . because the base was around a modern cartridge frame  his  acceptance for use into muzzle loading seasons was turned down at first   .as i understand it,  until he met the conditions of  the game commission and modified some aspects of his design to gain acceptance .
 gradually as things have relaxed  concerning the laws  these manufactures have slowly , one step at a time  drawn closer to their original intent  IMO a converted center fire  weapon . Some have even gone so far as selling interchangeable barrels systems so as to  convert back and forth  between breech loading and muzzle loading . This was very popular with shotguns some time back .
 I would also say this.   In-lines ignitions  have been around along time  the earliest I have documented  is 1710 and is a SXS flintlock .. These have however  really nothing  comparable  with the modern  in-lines of today .
 There ignition systems  while inline are completely different . IMO the closest to  a truly muzzleloader design would be those of doc white . It is however mu understanding that even White is moving away from this in favor of a newer bolt action design 
 So you see the  saying, if it looks like a duck but barks like a dog ,there for it must be a dog 

 Does not always work as it could  ,as in this case just be a duck   who is impersonating a  dog ,  for no other reason then to get at the food bowl.
 For the record , I have no problem with modern  muzzle loading firearms being discussed on this forum . I think we can all get along . However   both sides have to understand there are fundamental differences between traditional and modern systems and shooters . If a person does not wish to  read about modern weapons then ,,, simply don’t read  the thread .
 If modern shooters don’t wish to read someone’s BLA BLA about their chosen  weapon then  understand fully that the person writing it  simply has a different point of view . dont read the thread 
 I don’t think anyone is telling  anyone else  they have to agree or for that mater disagree