I agree it does not look to good from PR but that is 100% sustainable and they will shoot the same (usually more) next season. How many game shoots can say they are sustainable that no mater wot size the bag is.
Also i know that area and quite common to see a pair of HH over that moor, never seen as many kestrals for years as u do on that fell side
While it may not look good to outsiders when u actually understand how grouse shooting works some moors NEED to have these very big days. The moor mentioned shoots very few days yet carries a large stock of grouse. Plenty of moors in that area shoot 4 figure brace days surprisingly often in a normal season.
If u asked most grouse keepers they would far rather have as few days as possible shooting as large as bag as needed, so they can get the season over as quick as possible and get the grit out and get on with the vermin before the snow comes in and let the birds settle down and recover for winter
The biggest problem most of the better NE moors face is shooting enough grouse quick enough, if the weather closes in and still too many beaks to feed on moor even with modern medicated grit numbers will crash. A
lot of moors are shooting phenominal ammounts of grouse per season nowadays.
I heard of 1 marginal moor outwith the main grousy area, 5 or 6 years ago (in fact possibly longer ago
) broke the record for season but still had far too many grouse on hill, had 10 keepers days where doing various other poachers tricks to try and bring numbers down, ended up not shooting grouse for 3 seasons as number crashed that winter.
PS Just as an aside most keepers (but esp grouse keepers) are never overly happy to have bags broadcast with the estate name next to it, not top seceret (althou that moor is more so than most) but usually best to keep it slightly vague, thoose in the know will know which moor ur on about.