There is a technique to sight in a scope that only takes 3 shots to zero your scope. I have seen before but I can't remember where? I thought someone here might know how to do it.
the method i have used needs a gun vise or a good steady rest, aiming at your target with crosshairs on the dot shoot one shot. then after the shot put the crosshairs back on the dot,now the tricky part is to now move your crosshairs to the bullethole you just shot. Doing this without moving the gun while you turn the dial on the scope is difficult without a good solid rest. then shoot again to confirm your adjustments.
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Heres the six shot method, shoot a 3 shot group at 100 yards on a 1 inch grid, move the appropiate amount, shoot a 3 shot group and if you did your part then your on.
If you already know that your shooting good, the rifle shoots good, and the load shoots good it can be done. Otherwise you could wind up chasing errant shots. I did a three shot zero on a rifle this year when I changed scopes but I already knew the rifle and load to be dead on. I bore sighted the rifle, shot one shot at 100 yards, adjusted for zero, shot one shot at 200, adjusted for zero and then fired a confirmation shot at 200 which was really not needed. The last one was just for peace of mind. For hunting rifles I like a rifle that shoots properly on the first shot today, then again next week, and then again next month. If the first shot is on until next season then I'll be happy.
I've also chased groups all over the paper only to find out that something wasn't right with the rifle or load. It all depends. I don't really buy the shoot the rifle and then hold it on the shot and adjust to zero methods. It's just too hard to hold the rifle steady while adjusting the scope. Most people don't have any way of holding the rifle steady enough to do this including me. It doesn't take that much pressure to move the impact at 200 yards and if it moves while adjusting then you're ruined anyway.
Shoot at 25 yards.
Measure distance to where you want your bullet to hit.
Make adjustments on your scope (X4).
Move to 100 yards and shoot again.
Make any needed fine tuning and fire again.
Done.