Tad, the "silent" loads I spoke of are intended to be used on your neighbors' cats. As for downloading for plinking, just remember that hunting bullets are designed to expand at certain velocities. If you push them faster or slower than the velocities they were designed for, they will probably fail. You are correct about not using plinking loads for hunting purposes.
Remember, if you do load a plinking round, it will not hit the same point of aim as your hunting rounds. You must re-zero each time you change ammo.