10 meter match rifles - excellent. Essentially relies on the humans brain to centre a circle within a circle - a skill we are very good at.
It's when you try and hold it that the cracks appear.
For hunting on an air rifle legal limit or FAC - forget it.
Target is difficult to acquire and will take you so long to get the centre thing sorted that if the quarry is still in your sights, it has probably died of old age already.
In a battle of wits I refuse to engage with an unarmed person.
To one shot one kill, you need to seek the S. Kill only comes from Skill