I have old used 22 rifles I have collected.
I could hit the bullseye with open sights when i was 35, but by 40 I needed a scope.
If the rifle is old enough I drill and tap. Most have tip off ring dovetails. I put a scope on and see what ammo the rifle likes.
Half the good old beater rifles can average 1" 5 shot groups at 50 yards.
The occasional tiny group will show up and the occasional big group shows up, but they average at, and are usually close to 1".
That is doing everything right, with 6 targets on a page, shooting 30 shots, and average all 6 groups.
A new Shilen select match bull barrel with tight chamber and target ammo will shoot 1/2" 5 shots at 50y. Better go at dawn when the wind is low.
I read on the internet about guys getting good groups with 22 rifles at 100 yards. My group fly apart at ~ 75 yards when the bullet goes sub sonic.
YMMV