Thread: Sighting in your hunting rifle

Greetings Once More,
The zero ranges of 120, 172 and 200 metres mentioned in my earlier post are the actual ranges that the rifles are shot at. For target shooting at longer ranges and getting a base zero at 300 and 600 yards I make up a target with the aiming point at the bottom and the point of impact at 200 metres for either 300 or 600 yards zero marked on it. This is based on the chronographed velocity for the load and a drop chart for the load. For 300 yards the point of impact is around 150mm above point of aim and for 600 yards from about 600 to 700mm above point of aim. For 1,000 yards a base zero for 600 yards will likely be used at that range to validate both the point of impact and the BC followed by dialling up for 1,000 yards.
Why not just dial up from 100 metres you say? Any error at 100 metres is multiplied by 2.75 at 300 yards and 5.5 at 600 yards rather than half that when shooting at 200 metres.
Regards Grandpamac.