Budget is needed.

Variable (3-15 or 5-20), First Focal Plane, matching turrets & reticle (mil/mil or moa/moa).
Good rings and base for sure.

These would all be entry level scope for long range matches. You will get almost all the feature and they are reliable and with good tracking and usable reticles.

Burris XTR II
Gen 1 Razor
SWFA HD
Bushnell DMR