The problems with plinking aluminum cans, regardless of the caliber of the ammo, or the power of the Air Gun, is that they are easily blown over in a light wind, and are destroyed in less than a dozen shots. Also, if you need to transport them to or from an area that you can safely shoot - since they are so flimsy, they get crushed. I have a fix for all that.
Two – 12 packs of your favorite soda
One - 16 oz. can of “Great Stuff” (pressurized expanding insulation foam)
(You can substitute those nasty "plastic foam packing peanuts", or even use those plastic shopping bags that you've been saving and don't know what to do with).
Four - scrap washers, nuts and bolts per can.
Step 1: Making a Better Soda Can for Plinking, With a Fitted Carrier
Step 1 – .
Open the 12 pack carefully. Remove a can of soda. Drink the contents. Rinse the empty can, drain it and let it dry. Remove the pull tab. Repeat for all 12 cans in the case. Mark the case "MT" (Empty). Add the empty, dried cans back to the cardboard carrier. Repeat for the 2nd 12-pack.