I'm pretty fortunate, my home range goes out to 760yds, and I basically shoot from hill to hill. The majority of my backstops are dug into my hill side. On the one berm I had to make I used railroad ties for thae back side and filled with dirt. Pictured is my 760yd berm, which is still below one of my hillsides:
This gives you an idea of the topography:
The 760 Berm under construction:
The rounds are going into the hillside, but the berm makes it easier to spot misses.
300-400yd berm:
547 berm:
My normal "hunting practice" setup, TGTs going up my hillside out to 600yds.
Pistol range cut into hillside. The backstop also serves for 100-200yds: