I had seen that picture before too but do not know who owns it - then it also had a picture looking out 3x3 foot opening in that back wall (at bench tabled height) showing a 600yard or so range on the owners property.
It said the place was in Wyo or the Dakotas - Out a my league...

And, look carefully at my setup - you will see a 12" round 8mm film can lid under the powder measure I use to catch any spillage of powder. I want to make something to go under the scale and trickler (out of static free plastic) to catch spillage there too.