ten shot 617, Steel Challenge
You didn't mention whether or not your 617 was a ten shot model, perfect for steel challenge, although the 6 round cylinder gives you one extra shot, and the speedloaders are cheaper.
Another game not mentioned, falling plates. One local club running weekly falling plate matches found there was more demand for rimfire matches (the economy!) and they switch out to lighter plates, running about 3-1 rimfire vs centerfire. My club permits rimfire to shoot with the centerfire handguns at falling plate matches, we just watch carefully and count the hits. The .22 won't dependably knockover the full AR 500 plates.
and you can buy your own knockover plates from Gibson, good practice, good fun.