In this case, modern rifles had already been invented. The way I see this is that there were people that wanted to HUNT during muzzleloader season but wanted to circumvent the rules. The rules were established for the opportunity to hunt during the year when a traditional rifle hunter had a better chance for a shot at an animal. The caveat was that one had to practice hunting skills to get close enough to get that shot. But some hunters either weren't that good of a hunter or didn't want to go through the troubles of cleaning and fine tuning a muzzle loading rifle. So the modern muzzle loading rifle was born. Now most of the muzzle loading record books are filled with animals shot with scope sighted rifles and shot at or over 150 yards.
These seasons were adopted for traditional muzzle loading rifles. State game management agencies reacted after a length of time by changing the locations and times for muzzle loading hunting and tightening the rules. The states with intelligent fish and game agencies required flint lock only, God bless them.
And those that will gripe this rant to this post had best remember: Muzzle loader hunts were begun when there weren't any non-traditional rifles. Non-traditional rifles were invented for one reason, to give a hunter that didn't want to be limited by traditional rifles a better chance of filling their tag during traditional rifle season. Traditional rifle seasons were controlled or special hunts. The non traditional rifle hunter could then enter the drawings for these hunts. Not to go back to the days when their forefathers hunted, but to get an easy shot at a deer at over 150 yards and have a better chance to get their name in the record books. It is the dark side of being an American, if it's too hard, or you can't get it done, ......................................... cheat.