Quick Answer
Use turret adjustments when the holdover or wind deflection required exceeds the adjustment range of the scope's elevation or windage knobs, typically above 20-30 MOA at 1,000 yards or more.
When to Use Turret Adjustments
Turret adjustments are necessary when dealing with long-range shots that require significant holdovers or wind deflections. This is especially true at extreme ranges, where the adjustment range of the scope’s elevation or windage knobs is insufficient to compensate for the trajectory drop or wind drift. In such cases, turret adjustments allow for precise calibration of the scope’s reticle to match the trajectory of the bullet.
Understanding Scope Turret Adjustments
Most high-quality long-range scopes feature turret adjustments with a range of 20-40 MOA. When the required holdover or wind deflection exceeds this range, turret adjustments become necessary. For example, a .308 Winchester bullet at 1,000 yards may require a 30 MOA holdover for an 8 mph wind deflection. In this scenario, turret adjustments would be required to calibrate the scope’s reticle to match the bullet’s trajectory.
Techniques for Turret Adjustments
To perform turret adjustments effectively, mark the current turret position with a small notch or dot on the turret cap. Then, rotate the turret to the desired position, making sure to keep the scope level and aligned with the target. Once the turret is adjusted, lock it in place by tightening the turret cap. It’s essential to keep track of the turret adjustments and record them in a shooting log to ensure accurate tracking of the scope’s calibration.
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