The article even discussed shotgun slugs, which are 1oz or more of concentrated ball-of-fun. They will disperse equally, as well, upon impact. Again, assuming speed and distance are within the range (and distance is more because it impact the velocity)
A key # was 3000fps maximum. Since a lot of 5.56/.223 rounds live in that speed range, one would have to choose their rounds carefully if they are going to spend $400 for a steel gong target. One wouldn't want to destroy such a fun toy with 3200fps green-tip ammo.
.45acp, .40 S&W, 9mm, .38 Spl, .380 acp, 22lr
12 gauge, .223/5.56x45mm, 30-30 Winchester
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