I tried to make a spinner with mild steel once a long time ago was banging away with 110 Vmax from a 30-06 and the thing wasn't moving... walked down and had a nice group of holes in the steel.If you’re looking for zero damage 2600 fps.
110 v max at 3600 leaves a crater.
We have hanging steel targets & steel silhouette targets at 200M, and knockdown steel plates at 25Yds, and 20 Yds. The rules for the Club are simple: no steel core penetrator ammunition is to be fired on any steel target considered club property. No Magnum loads or rounds in excess of 1200 fps are to be fired on the knockdown plates.Bullets going really fast are hard on targets, as are ones with really hard bits like steel or tungsten in them.
One target manufacturers website reccomends 100 yds or more standoff for a 55gr bullet from a 16" 223 and 300yds for a 204 ruger to avoid damage.
No way at that distance are you going to put that stated round223 with 75 gr at 50 yards will drill holes through them.