Gene Curtis gave me the idea for this. He uses spray adhesive to sick targets to yard signs. As a variation for my rimfires and .223, I bought four 24 inch long, 3/8 in diameter pieces of rebar and four lengths of 8 ft 1x2 inch pieces of treated pine. I drive two nails through the upper half of each pole, at an upward angle. I can drive pairs rebar pins into even very hard ground about 6 inches with a hammer, two at 50 and two at 100 yards, and use two cable ties to secure each of the uprights to the rebar. I press a 2x4 ft piece of the blue styrofoam insulation board over the nails in each upright to hang it securely.
A very light coat of 3M Super 77 adhesive on the blue board sticks 8 targets on the board before I head for the range. Takes only a couple of minutes to set up or take down, and I can quickly move from 50 to 100 yards. When I finish, I just take the blue board back with me, targets attached. I can hang more if I want, but it makes things much cleaner, having no loose paper targets to keep up with. And it seems to make me more focused to think ahead of time about targets I want to shoot -- to sight in, shoot a fun match, etc.
I have also started using the blue board to front my duct seal putty lined target traps. Holds the targets absolutely flat -- they never flap in the breeze. If you dog-tag one ear of the paper target and use the spray adhesive sparingly, replacing targets is easy. The backing makes the holes punched in the paper targets crisper, and it seems to have a bit of "self-healing" property too. The holes in the styrofoam insulation tend to close back up after the pellet passes through, especially with domed pellets. I can hang several small targets on my larger trap. The styrofoam is cheaper to replace than clipboards, too.