I would just like to note that they were shooting at 2 separate plates here, and only shot each plate once with the grade of ammo at which they were rated. The first plate they did shoot with 5 smaller rounds after they hit it with the larger one, but they didn’t shoot both of those larger rounds at the same plate.
All the guy you replied to said was that the bulge on the back of the plate from each of those rounds forms fast and hard enough that you’d feel it. Top comment of this chain was a different account.