I was never one to look down on those who use inline ignition muzzleloaders. I own them, and use them. I can fully understand why some want to keep it more historically accurate, but that opens a whole can of worms. I always said, as long as it loads from the muzzle, it is a muzzle loader. While some of the new wizz bang products out there can expedite the learning curve, inline rifles still face many of the same challenges as any side lock. I always felt pelletized powder is nipping on the edge of what is proper, but I let people do their own thing, plus pelletized powder is inferior in every way except convenience.
Today I found a new product from Federal, called FireStick. https://www.federalpremium.com/firestick.html
I read it, and immediately felt sick to my stomach. That is blatantly a breech loading cartridge. I'll be writing the MN DNR for sure. While it may not seem like much to the hardcore traditionalists, I like to keep muzzleloader equipment up to the individual. But this insults that openness. I'll recommend that the definition be changed such that it reads "a muzzleloader is a firearm that powder and projectile are loaded by hand from the muzzle".
Currently the MN regulations read "The muzzleloader (long gun or handgun) used cannot be loaded at the breech (muzzleloading revolvers are not legal for taking big game). So this new cartridge may not even be legal here to begin with, which is a relief.