Another item to watch out for (especially on home made, out door ranges) are Rubber Tires!
My father in law has a little 2 shot daranger, the barrel isn't much longer than 2 inches. I asked him if he could hit anything with it, and he replied I should go find out for myself.
We put a 1 gallon milk jug on top of a board, which was on a stack of tires in the shooting pit. I first started at 20 foot, two rounds, no hits. Moved to 10ft, still couldn't hit it. Finally moved up to 5 foot, still missed the dang gallon jug, but succeded in shooting myself in the abdomen! The round was centered, but was low, and consequently hit the outside of one tire. The geometry was such it sent the round right back where it came from, just lower, hitting me in the abdomen just above the family jewls.
Fortunatly no harm done, but I refused to admit defeat. To avoid shooting myself again I side stepped sever feet, and tried again. YUP, same results, but this time I shot myself closer to my belly button!
Moral to the story is, if you hit a cylinder, and a line drawn from the barrel to the impact site lines up with the center of the cylinder, the round WILL return to whence it came, but at just a slightly different elevation!
As I walk out of the pit, my Father in law asks "So, Did you hit it?" I replied "NO, but I did shoot myself in the gut, not once, but twice!
OH, and the milk jug, it found the business end of a 30-06 from 100ft, with me laying in the prone position behind, yup you guessed it, a rubber tire!
