What do you mean by "mean"?
The intention of the recommendation is to make the size of the hitzone the difficulty, not the position of the target.
So, the idea is that the shooter does not have to adopt a position different from his/her normal seated position in order to hit the target.
Obviously this will differ from shooter to shooter, which makes it difficult to define, particularly with different terrain and shape of the shooter.
You could say ±10° from the horizontal, but what if a 4'2" shooter claims the target is at 11° for them? And where is horizontal exactly at Millride?
You'll end up with FT being 10m shooting in the village hall.
Last edited by saddler; 18th June 2015 at 10:02 AM.