First never repeat never sight a gun in off a truck hood ,box or trampoline.Get a bench[picknic table ] Use steel rings and mounts. To illiminate human error use an adjustable front rest sand bagged [Ihave #8 leadshot in mine better than sand] and a rearbag with sand or leadshot.Set a target up at 20 yards and boresight it.Remove bolt and position gun in bags til you have the bullseye in the bore then adjust the scope til the x is on the bullseye.Fire a shot and adjust until hitting centre.Move target out to 100 yards and fire a 3 shot group then fine tune it from there.Bore sighting saves a lot of ammo and works like a big peep sight.........Hope this helps................Harold