I have one of these and it works great for 22. I move it around to different distances to sight in my 22 rifles.
You can make a bullet trap for BB's by packing a big cardboard box full of crumpled up newspaper. Or hang pieces of carpet or towel off a series of dowel rods sitting on top of the box. You can reuse the BB's with that.
I use the cardboard box for indoor air soft. You need to be careful you don't shoot a hole in the middle of your target packing. Then the airsoft BB's will shoot through and put a hole in the window blinds behind it. LOL