The beginnings of the 200 yard bench.
After giving it much thought, I decided to go with a wooden bench on a wooden platform.
A concrete bench on a concrete pad would be the ultimate in rigidity, and not difficult to make. So why not make a concrete bench? For one thing, the prairie grass on my property grows 3 to 4 feet tall in the summer, so I would have to mow the grass before I could shoot over a 32" tall concrete bench. I don't like to mow!
The other problem is that, from this location I can only shoot 250 yards or so max. There is another location on my property where I could safely shoot 300 - 400 yards, but that location doesn't work well for 100 or 200 yards. Perhaps someday I'll build a permanent bench at that location, but in the meantime I like the idea of a bench that can be moved from one location to another if the need arises. Also, there are tree seedlings scattered around on my property that will eventually become trees and perhaps block existing shooting lanes. Cutting the trees is not a good option after working so hard to grow them, so it may become necessary, over the years, to move my shooting bench a little bit to allow for trees.
So what I decided on was a wooden platform built on railroad ties. If necessary, the whole shebang can be skidded around my property. Plus, the platform raises the bench over a foot so (hopefully) the line of fire will clear the grass without mowing.
The far fenceline is 400+ yards, but for safety reasons the max range from this location will probably be 275 yards so that there will be plenty of hill behind the target to catch the bullets.
Anyway, that's the plan, at least until I change my mind.