What is the point of a scope you can not trust to do its job?
It throws a variable into the equation that you can not account for. With good glass on a good rifle, the bullets should generally end up exactly where you want them at 100-200 yards if the shooter is doing their job correctly.
As far as some good quality affordable glass... I am a repeat buyer of Redfield optics. Made in the USA, sister company to leupold, lifetime warranty, great light transmission, choice of reticles, and prices between 170 and 250 dollars. Their newest line has a range finding reticle.
It puts bullets exactly where I want them to be. If it doesn't, I consider it to be my fault and not my rifle or the scope mounted on it.