Myself and a few friends want to build a target gong for use with both rifles and pistols. Rifle calibers to be used are: 7.62x39, .223 and 5.45x39. Will 1/2 hardened steel plates work for such? I guess they probably won't penetrate but will likely bend it after some use. What I would like is a 10"-12" diameter gong, not too large for 100 yards, but big enough for 25 yard pistols. I plan to either weld chains or steel cable and secure it to the target posts @100 yards-200 yards w/ caribiners through the holes in the target posts so it will just hang freely. Friend has a welder, so he wanted to start, but I want to make sure we build something that will last at least a few outings. Thanks for any suggestions.