John, your description of changing your sight window manually, describes our Pennsylvania Flintlock Season, (THE ONLY REMAINING FLINTLOCK ONLY SEASON IN NORTH AMERICA), to a tee.
Since 1974, those of us adamently adhering to keeping this one-of-a-kind season unique to flintlock rifles and fowlers only, have faced a great deal of pressure from shooters of modern in-line weapons. The in-line shooters are interested in one thing, and that is, harvesting a whitetail well beyond the range of a tempromental flintlock.
Harvesting a whitetail to traditional, after Christmas, flintlock users isn't a, "draw blood" outing. It is more about experiencing and re-enacting hunts by our Pennsylvania ancestors. They settled, expanded, and created the State we know today with identical flintlock rifles and fowlers.
Pennsylvania is indeed unique. We are the last State in America and North America to offer hunters this last-of-its-kind, Flintlock Season! And, for those with limited knowledge of Pennsylvania History, flintlock long-guns helped define Pennsylvania as a Keystone State!
Perhaps, Pennsylvania remains one of the final States to keep Sundays closed to hunting for similar reasons. The main reason being that our Pennsylvania Sunday is the last day of the week States have struggled to change to, "nothing more unique than any other day of the week"!
I feel strongly that we Pennsylvanians must fight as one voice to clarify our Sunday Hunting Position! In this State, we don't kill God's creatures on the Sabbath. Simple!
Pennsylvania, remaining in the last group of hold-outs, warms my heart!