I am a lucky guy. My father in law, and a best friend work for a local steel plant. During breaks, and down time, they created a steel target for my use at my home range.
Three 'ringers' on a central rod. Rings and swings when hit. Each plate is 4" in diameter and 3/4" thick.
I shot the plates with several selections of ammo and calibers today.
.22 Long rifle. Nice black mark on the steel, not much movement, nice 'spink' sound when it impacted.
.380 (Wolf?) Nice black mark on the steel, barely moved the plate. More of a 'bang' than the .22 long rifle, but not much. 1/4 of a flip, but not all the way over.
9mm (PMC?) more effect than the .380, moved the steel plate one complete flip. Sometimes 2 flips.
.40 SW, Flat nose, 180 grain. Flipped the plates, 3-4 times. SMall indentation in the steel, but not remarkably more than the 9mm.
.40 SW Federal Personal Defense, Flipped the plates 3-4 times. Small indentation. Seemed to have identical impact of 180 grain bullet.
.45 LC, Nice! Flipped the plates slower (?), but seemed to hold its own for the effect against the .40 SW.
.223 25 yds. Ooops! 1/8th inch impact crater. Wolf ammo, not a green tip. Spun like crazy.
.270 90 Yds. Yup, bigger oops! 1/4"+ crater. Spun the heck out of the plates. Spun like it was motorized. Dented back of the steel plate.
BTW... SAFETY GLASSES MANDATORY against steel, pplease!
TheRedGoat