I'm sorry that I didn't answer your suggestions right away--I'll try to answer everyone now.
I hadn't thought about the mess cleaning up an outdoor range. The group that I heard about that shot balloons and similar things must use an indoor range.
Perhaps I could get a group going. However, since I am a "newbie" myself, I would have to get an experienced range master to make sure that we followed safety procedures.
My instructor taught me to clean up the range. Actually, I find sweeping up [but only behind the shooters] gives me something to do when I'm waiting my turn on the range. People who leave a mess should lose their range permits, I think. I for one don't want to slide on empty shells and fall into a shooter!
I'll check out a cowboy action shooting. If they let me bring the 617, I'd go for it.