RE: Sighting in a riflescope
When sighting in a new rifle scope the first thing I do with a bolt rifle is bore sight by placing a orange target dot on a target at 25, then remove the bolt and place in a craddle/solid rest/ a spare set of hands, etc so that my bore is centred on the dot and then adjust the cross hairs to match. I then shoot 1 at 25, if major adjustmentare needed I make the adjustments and fire another shot. Remember/note when making adjustments at 25 yards you need to times (1/4)x 4 or 16 clicks = 1". I then move to 100 yards and shoot a 3 shot group before fine tuning. Once I have fine tuned I continue shooting 3 shot groups to verify load/gun accuracy.
Forload development/testing I just make sure I'm on target for shooting test groups. I fine tune when I have found theload combos of interest.
Highest X on the scope for sight in.