Time to science the hell out of this.
The best way to measure the permanent cavity a bullet makes is to fill the cavity with a silicone, let it harden, remove it, and place it a container of water to measure how much it rises.
Unfortunately no one does that so the best we can do for this internet discuss is treat the cavity as a cylinder and take it's volume (pi*r^2*h, r=.5expansion and h=penetration).
Using Lucky Gunners data,
http://www.luckygunner.com/labs/self-defense-ammo-ballistic-tests/, I'm using the best performing HST round from each caliber: 124+P, 180, and 230+P.
124+P: pi*(.5*.66")^2))*18.3"=6.26 cubic inches
180: pi*(.5*.72")^2))*18.5"=7.53 cubic inches
230+P: pi*(.5*.79")^2))*14"=7.94 cubic inches
Take the cavity per round and multiply that by the total number of rounds in the gun.
G17 (18): 18*6.26=112.68 cubic inches
G22 (16): 16*7.53=120.48 cubic inches
G21 (14): 14*7.94=111.16 cubic inches
G19 (16): 16*6.26=100.16 cubic inches
G23 (14): 14*7.53=105.2 cubic inches
G30 (11): 11*7.94=87.34 cubic inches
G26 (11): 11*6.26=68.86 cubic inches
G27 (10): 10*7.53=75.3 cubic inches
G36 (7): 7*7.94=55.58 cubic inches
Next factor to consider is hits on target. LEOs miss 70-80% of the time,
http://soldiersystems.net/2014/09/25/fbi-9mm-justification-fbi-training-division/. It does not matter if it is your first time shooting or you are Rob Leeham, the more recoil a gun has the harder followup shots will be.
Recoil:
This calculation is based on a public domain free recoil equation that takes into account the bullet weight and muzzle velocity plus the cartridge powder charge weight and expelling gas muzzle velocity applied against the gun's weight. The result is measured in foot-pounds of energy.
vgu = {(mp • vp) + ( mc • vc)} / mgu • 7000 → Etgu = mgu • vgu2 / 2 • gc
Where:
Etgu is the recoil energy expressed in foot-pounds (ft·lb).
mgu is the weight of the gun expressed in pounds (lb).
mp is the weight of the bullet expressed in grains (gr).
mc is the weight of the powder charge expressed in grains (gr).
vgu is the total forward velocity of the gun expressed in feet per second (ft/s).
vp is the velocity of the bullet expressed in feet per second (ft/s).
vc is the velocity of the powder charge expressed in feet per second (ft/s).
gc is the dimensional constant and is the numeral coefficient of 32.1739.
7000 is the conversion factor to set the equation equal to pounds.
G17: 5.6 ft-lbs
G22: 8.5 ft-lbs
G21: 8.7 ft-lbs
G19: 5.8 ft-lbs
G23: 9.1 ft-lbs
G30: 9.1 ft-lbs
G26: 6.2 ft-lbs
G27: 9.5 ft-lbs
G36: 10.9 ft-lbs
Source -
http://www.genitron.com/
With more recoil there is less hits on target, on one end is 30% hits on target and the other is 20%.
Take the 5.3 ft-lbs difference (10.9-5.6) and break that down to 53 .1ft-lbs and divide the 10% LEO accuracy to it. Every .1 ft-lb more of recoil decreases accuracy .1886%.
The accuracy by recoil is:
G17: 30%
G22: 24.52%
G21: 24.15%
G19: 29.62%
G23: 23.39%
G30: 23.39%
G26: 28.87%
G27: 22.64%
G36: 20%
We take this hit rate and apply to the wounding capacity of the gun.
G17: 112.68 * .30 =33.804 cubic inches
G22: 120.48 * .2452 = 29.55 cubic inches
G21: 111.16 * .2415 = 26.85 cubic inches
G19: 100.16 * .2962 = 29.67 cubic inches
G23: 105.42 * .2339 = 24.66 cubic inches
G30: 87.34 * .2339 = 20.43 cubic inches
G26: 68.86 * .2886 = 19.88 cubic inches
G27: 75.3 * .2142 = 17.05 cubic inches
G36: 55.58 * .2 = 11.12 cubic inches
I have everything laid out for you to mathematically refute me. I encourage you to do so wholesomely laying everything out just as I did.