Depending on the height of your sights (assuming a scope), you'll be dead-on at ~25yds and again at ~250yds.
If you have a large objective scope and high-rings, it'll be closer to dead-on at 50yds and again at 250yds.
This is a "general" trend. Differences in velocities and trajectories will cause variances as to the "zero" ranges. But for bullets in the 2,700fps to 3,200fps, this is a general rule. Also assuming a scope height of 1.5-1.75" over the line of bore.
If you're talking about iron sights, then a 12yd and 100yd rule will roughly apply, again assuming a line-of-sight of 3/4" over line of bore.