I tried searching for some background on this yardage that I`ve seen mentioned on here and on pics of factory targets for the webleys (also on this site), but came up empty, hence the question.

I`ve stumbled over several references to this, for me somewhat curious distance, I`ve done ISSF 10 meters and never heard about any other distances in "formal" airpistol comps, is this some English, historical program/distance for airpistols ?

I`m a bit intrigued and would appreciate any information on this, both to rule set and historical background...