Originally Posted by tbrice23
JMB ballistics ask for sight offset. This criteria for calculating drops and windage is where I might get into trouble on long shots . How much does sight offset affect these calculations?
It's a small but measurable effect. Sight offset usually comes from the rings, but base misalignment and barrel misalignment can also be a factor. For most rifle set ups, the offset is less than 0.1", but can be larger if the reticle is not aligned properly. Play with the JBM calculator to determine the magnitude of the offset.
Using the Reticle Alignment Tool from HighPowerOptics will eliminate this error.