They are all manufactured the same way. The difference is the glass.
You have a reticle , Len's, sub tensions , and an erector tube. They all have springs.
You have to be able to count on these springs.
The scope, when placed upon said rifle, must be leveled. Absolute Level. Not just level , accuracy wise. Absolute level 0.
This gives the springs absolute rebound.
Then you have to control that, on a bench, bipod,,,,,,,,,,,free handed. You see where this is going.
Then comes the next step to see how truly accurate you are.
You cannot be shooting off the hood of your truck.
A rear rest should not matter if there is a fence post nearby. If you're hunting.
If you're going for absolute accuracy, you will require a very good , one piece rest.
Those vary in price from $1200.00 to $2000.00. or more. You see them all the time in ARA matches.
That's when you see what your gun is truly capable of.
It's not always the arrow. Sometimes , it's the Indian.
In 2025, nearly every scope discussed on this site within the last 5 years will hold zero mark.
Glass.