DayZ field wiki · Gear
Zeroing
Numbers on the glass
Short answer
A scope you didn't zero is jewelry. Cover still wins. Hold breath is a different page.
Also: zero · scope zero
How it works
Zeroing is the range the optic thinks you meant. This page does not print a table per gun.
What to do
When you find glass, set it. Practice on a can, not on a geared stranger at dusk.
Don't
Don't hip-fire a hunting scope as a bit.