I haven't killed anything but paper with them so far, but they work well, and shoot true out of my Beretta and Walther. For what it's worth, 22Plinkster has a review of it on YouTube: https://www.youtube.com/watch?v=Fl1HUMt5UpM
I just purchased a rifle in PA, and one a bit earlier in TX, no problem at all as a MD resident. Of course, both were legal to own in the great state of MD.