You actually made my point, Dave.
I disagree. If that were true, why would've there been the move from flintlock to percussion in the 19th Century?
Correct me if I'm wrong, but the move from matchlock to wheellock to flintlock to percussion to inline still relied on one characteristic - they all load from the muzzle end. Ignition systems are not relevant to that one attribute, and I'll even go as far as state it's the primitive technique inherent in frontstuffing that sets it apart from the breechloaders, especially for the purposes of separate hunting seasons. Gary makes a very valid point with his concept of Whitworth-barreled flintlock. My latest edition of The Blackpowder Annual has articles about muzzleloading Schuetzen rifles, and their accuracy is nothing to sneeze at. Just like the Whitworth, Mortimer, and Gibbs rifles, long range accuracy out of a frontstuffer isn't relegated to those with inline ignition and optics.
"Primitive" means, when hunting with a frontstuffer, you get one shot (maybe two with a double barrel variant or six with a Colt-Root revolving rifle), then you get to take a time-out while you go through the ritual of putting powder, projectile, and ignition source into the equation, be it a lit slow match, a flash pan full of FFFg, a No. 11 Musket Cap on the nipple, or a Federal 209 Shotgun primer in the breech. All variants are primitive compared to even the Martini-Henry or Trapdoor Springfield.
Again, it sounds like the bickering that took place at USPSA/IPSC, resulting in IDPA springing forth from the chaos. To my way of thinking, more people in the woods this fall, including our younger generation of hunters, is not a bad thing, considering that hunting itself has tapered off considerably over the last several decades, let alone the concept of taking new shooters under wing and introducing them to the sport. I've got a .54 caliber percussion Hawken that at one time purists considered to be an abomination in the woods. I'm glad to see prejudices still survive to this day, albeit shifted to a new scapegoat. Instead of welcoming them into the fraternity, we're snubbing them for their choice of muzzleloader. Great.