It's accurate but I cannot shoot past a hundred yards
Then don't
I have a custom made, .308, bolt action, "scout" style rifle. I have a variable Leopold scope, and it's super accurate. I have no problems placing a shot at 300 yards with it, and with some practice could go farther.
I don't use it for hunting these days.
I built it when I was in a state that I could use a rifle for deer. Then I moved into an area where I had to drive two hours or more to be able to use legally it, or... I could stay closer to home and use a shotgun or black powder, and get the deer in closer than 100 yards.
Turns out... it was and is much more fun,
for me , to work at getting the deer in at 100 yards or even closer, and to use a replica black powder rifle when I do.
So...
don't lament the iron sight .30-30, but instead work with it a bit and see if you don't find it more satisfying, or satisfying in a different way, than your long range rifle.
IF it turns out to be nothing but a hassle for you... then you'll know, but I think it will help hone your skills some, and you'll have a good experience to boot.
LD