Max wall = 7000HP
0.06*7000 = 420 damage.
4x damage = 1680 damage.
New wall health = 5320HP
0.06*5320 = 319.2 damage.
4x damage = 1276.8 damage.
New wall health = 4044.2HP
0.06*4044.2 = 242.562 damage.
4x damage = 970.608
I don't need to continue to show the math here is a little weird. even doing it the other way round (24% damage instantly against walls) you can instantly see that the numbers don't add up.
There's something we're missing.

