So what! I'm sure I can read stories about 9mm bouncing off a perps head to - so what. A couple of stories does not make a trend. No reason given the same exact circumstances that any of these rounds will not get the job done. 9mm is not going to penetrate substantially different (better OR worse) than 40S&W or 45ACP.
Stories are one thing, police reports are another.
I'm not talking hydrostatic shock, BPW, or any of that other crap. A higher velocity projectile with a slim profile will in FACT penetrate hard barriers at off set angles or directly perpendicular shots better than a larger diameter projectile at slower velocities. I like this post from BrokenArrow:
"Boise, Idaho. 9-20-97. Traffic stop to shooting.
Brothers Craig and Doug Brodrick killed. Officers Winegar wounded, Stall killed. One brother took 25 hits of 45 JHPs in two volleys as he walked around his car, the other took 7 hits of 45 JHPs, of 52 total rounds fired by 7 officers. Brothers returned fire w 9 minimeters, wounding one officer and killing another in the 30 second gunfight.
Two holes are better than one hole, and one hole is better than no hole. Or is it?
BULLET PENETRATION - INCHES OF PLYWOOD (test blocks made up of half inch boards)
9mm Parabellum Inches
123 grain FMJ 4.4"
115 grain JHP +P+ 3.0"
115 grain JHP 2.7"
115 grain Silvertip 2.5"
80 grain Glaser 2.0"
.45 ACP Inches
230 grain FMJ 2.8"
200 grain JHP 2.4"
185 grain JHP 2.4"
185 grain Silvertip 1.7"
135 grain Glaser 1.3"
BULLET PENETRATION - INTERIOR WALL TESTS
Constructed of 2 sheets of 1/2" drywall mounted to 2x4" studs
on 16" centers.
Caliber Walls penetrated
9mmP FMJ 11
9mmP JHP 9
.45 ACP JHP 8
A blast from the past:
SPRINGFIELD ARMORY
RESEARCH AND DEVELOPMENT DIVISION
MEMORANDUM REPORT SA-MR 20-2100
L O Spaulding/lv
24 August 1948
SUBJECT:
Effective Penetration Range of 9mm Parabellum Ammunition.
OBJECT:
To determine the greatest range at which the subject ammunition will
penetrate the M1 helmet.
SUMMARY:
M1 helmets were fired at using different 9mm ammunition to determine the greatest penetration range. A Canadian 9mm Parabellum ammunition having a velocity of 1250 f/s penetrated the M1 helmet at 130 yards, which was further than any of the other ammunition tested.
REFERENCE:
Project TS2-7875-2024 J O 7875-6160
MATERIAL:
1. Weapons
a. Browning FN 9mm Pistol, HP Inglis-Canada, Serial Number 8T2367
b. Colt Automatic Pistol, Cal .45, 1911A1, Serial Number 1651407
2. Ammunition
a. Special 9mm Parabellum cases and Cal .38 S&W Special Bullets (Metal clad, 158 grains) and loaded to a velocity of 850 f/s.
b. Winchester 9mm Parabellum, 116 grain bullet, Lot WRA22026, 1,150 f/s instrumental velocity at 53 feet.
c. Cartridges, Ball, 9mm M1, 116 grain bullet (Parabellum) (Code T2CAB) Lot DIL- 617 (Canadian) 1,250 f/s instrumental velocity at 53 feet.
d. Pistol Ball Cal .45 M1911, Lot E C S25250.
3. M1 Helmets
4. Outdoor range facilities
PROCEDURE:
An M1 helmet was placed on top of a stake, back of which a target was set up to facilitate aiming and to lend support to the helmet. The 9mm Canadian pistol was then fired from a muzzle and elbow rest at the helmet. In the event the helmet was pierced, it was moved away from the shooter 10 yards and the procedure repeated until failure to pierce the helmet resulted. This procedure was followed with the special 9mm ammunition and with the high and low velocity 9mm ammunition. A similar test was run using a Colt Cal .45.
RESULTS:
1. The special 9mm Parabellum case with a Cal 38 S&W bullet penetrated the M1 helmet at 50 yards, but not 60 yards.
2. The Winchester 9mm Parabellum (1,150 f/s velocity) penetrated the M1 helmet at 120 yards, but not at 130 yards.
3. The Canadian 9mm Parabellum (1,250 f/s velocity) penetrated the M1 helmet at 130 yards, but due to lack of longer range facilities was not fired beyond this point.
4. The Cal .45 ammunition penetrated the helmet at 30 yards, but not at 35 yards.
CONCLUSION:
It is concluded that the Canadian 9mm Parabellum ammunition with the 1250 f/s velocity, had a longer range penetration power than any of the other ammunition tested.
Prepared By: L O Spaulding, Ordnance Engineer
H F Hawthorne, Ordnance Engineer
E W Hopkins, Head Ordnance Engineer"
Relying on the FBI gel tests as being the end all be all of substance penetration is a mistake in my opinion. As we can clearly see from other forms of tests the gel test does NOT account for the results of some LE shootings nor does it account for the capabilities of each caliber.