We all want to be able to reliably hit our target at all reasonable ranges. Doing so involves appropriately sighting in one’s rifle, knowing where on the target the bullet needs to strike, and good knowledge of exterior ballistics for the range, weather conditions, and altitude.
Read the overview page for getting a feeling for how the sight picture calculator can help understand where the hold should be, and then “Sighting in for Hunting” can help you better appreciate options for sighting in.