We all call it stumpshooting....it's more Roving around and picking out targets in the woods or fields at unknown distances and shoot at them.
It's the only form I practice I use. Roam the hardwoods and pick out stumps, small limbs, clumps of leaves...shoot uphill, down hill, kneeling etc..
Smaller the target...forces concentration. Longer shots, make you concentrate even harder.
Use Judos, Tiger claws, homemade points that won't bury in soft dirt or leaves. Here in NY, a great time to combine squirrel hunting and roving. Plenty of action and plenty of shooting.