It is easy math.I was told there wouldn't be any math on this test.
11.5 X 22.8 X 7 = 1835
9 X 19 X 11 = 1881
So 7 rounds of 45 ACP roughly almost equals 11 rounds of 9mm. That is why we have two caliber war threads open now.
But when you throw the economics of bulk ammo in to play
11 X $.13 = $1.43
vs.
7 X $.46 = $3.22
The 9mm is the clear winner.