I have read threads in the past where guys shot through a number of tires fastened together.
I was recently thinking about trying to build something like this but that article posted earlier looks interesting. The problem I see with these things is that you have to remain in one position, and I was interested in practicing shooting a .22 rifle from prone/sitting/offhand. I thought about putting the thing on an ATV jack if I could find one cheap enough.
FWIW: I have 18 acres and could legally shoot on my property (I am not in any city limits), however I don't want to make it known (any more than it already is) that I am a gun owner. I also would like to avoid being known as that nut that is shooting all the time.
You know the rest. In the books you have read
How the British Regulars fired and fled,
How the farmers gave them ball for ball,
From behind each fence and farmyard wall,
Chasing the redcoats down the lane,
Then crossing the fields to emerge again
Under the trees at the turn of the road,
And only pausing to fire and load.