I used the RRT launcher that uses ramshot 22 blanks. It makes a good noise but not too lound, it doesnt look like a gun so you can use it a few more places as well. Launches bumpers and fake ducks a good 100yds with high power loads. Only took a few shots to get my pup used to the noise, now it makes her super excited when she hears or sees guns. I held her on heel and my buddy shot it a few times from 20yds or so, then I shot it, took ten minutes and my dog never even blinked, she was focused on the bumper. Launcher leaves hands free as well.