If you are a top shot, FT or one of the other disciplines, and can hit paper targets out to 60m, then 1/3 is 40m in the field. Thats 15m beyond the farmyard 25m. 40m is long enough when all other factors are taken into account.
With 12ft/lbs air rifles I stick with shooting within the farmyard though I do have a bedroom window shoot into my garden that is up to 33m (I have a bedroom rifle just for that; I have a lot of rabbits getting into my garden, and yes my wife does make comments). But thats my limit.
Know your kit, know your limits, your call. Be a sportsman not a chancer.

For the rest, open farmland, its rimfires and centrefires for me. And they are limited in the same way.