Ive been running 2 of the 6-24x, mildot, SF midwayusa special 30mm tubed BSA for over 12 yrs without a hiccup, my pal has 3 of them, same, not a single fault with them.
They have all seen hard use in every type of weather from CA to WY and still are ticking away. We have never had a problem shooting the "box" at all, tracks as good as any other scopes we use.
Dial up from 10 to 1150 yards has not been ANY issue. We shoot them in p-dog towns out here and they all have way over 20k rounds under their belts each.
They all have been dropped, soaking wet in snow/rain/mud dust and just keep on going.
They have been on top of .223, 6x45, 20p, 6X6.8, 243, 7-08, 30-06 rigs.
I also have a 30yr old BSA target Platnum scope that is very clear, tracks as well and is still in use on a Varmint rig.
That said those are the only 2 modles Ive used or own.