...but at similar penetrations on bare gel the .45 cut a bit deeper with GD, and expanded better as well, and penetration was equal between the two on the radically expanding HST's, however the 230 enjoyed a great deal more expansion for the same, barely qualifying penetration.
Using the data for the Gold Dot, let's quantify how much "a bit" really is.
9mm, 124 gr. +P:
BG Pen. = 11.78" (FBI FAIL)
IWBA Pen.= 15.88" (FBI PASS)
BG Exp. = .720" or ~2.028 x Cal.
IWBA Exp. = .560" or ~1.577 x Cal.
9mm, 147 gr.:
BG Pen. = 12.58" (FBI PASS)
IWBA Pen. = 16.93" (FBI PASS)
BG Exp. = .660" or ~1.859 x Cal.
IWBA Exp. = .540" or ~1.521 x Cal.
.45 ACP, 200 gr. +P:
BG Pen. = 10.33" (FBI FAIL)
BG Pen. vs. 9mm 124 gr. = ~-14.036%
BG Pen. vs. 9mm 147 gr. = ~-21.781%
IWBA Pen. = 15.20" (FBI PASS)
IWBA Pen. vs. 9mm 124 gr. = ~-4.473%
IWBA Pen. vs. 9mm 147 gr. = ~-11.381%
BG Exp. = .819" or ~1.811 x Cal.
BG Exp. vs. 9mm 124 gr. = +13.750%/~-11.982%
BG Exp. vs. 9mm 147 gr. = ~+24.091%/~-2.650%
IWBA Exp. = .675" or ~1.493 x Cal.
IWBA Exp. vs. 9mm 124 gr. = ~+20.535%/~-5.626%
IWBA Exp. vs. 9mm 147 gr. = +25.000%/~-1.875%
.45 ACP, 230 Gr.:
BG Pen. = 13.00" (FBI PASS)
BG Pen. vs. 9mm 124 gr. = ~+9.384%
BG Pen. vs. 9mm 147 gr. = ~+3.338%
IWBA Pen. = 14.55" (FBI PASS)
IWBA Pen. vs. 9mm 124 gr. = ~-9.140%
IWBA Pen. vs. 9mm 147 gr. = ~-16.357%
BG Exp. = .711" or ~1.573 x Cal.
BG Exp. vs. 9mm 124 gr. = ~-1.265%/~-28.925%
BG Exp. vs. 9mm 147 gr. = ~+7.727%/~-18.181%
IWBA Exp. = .675" or ~1.493 x Cal.
IWBA Exp. vs. 9mm 124 gr. = ~+20.535%/~-5.626%
IWBA Exp. vs. 9mm 147 gr. = +20.000%/~-1.875%
As we can see, no one number tells the whole story. The 9mm Gold Dot offerings excel in some areas while the .45 ACP offerings excel in others. While the .45 ACP edges out the 9mm in expanded diameters, the 9mm loads turn out to be the better expanders when comparing "expansion ÷ caliber" numbers. Regardless, even the 124 gr. +P load which fails the 12" minimum penetration depth protocol still makes DogGKR's "list" because it's a robust expander when fired through intermediate barriers such as wallboard, steel, and automotive glass by virtue of it tending to retain its weight very well.
With IWBA heavy clothing, the 9mm GD's under expanded and penetrated past the .45, with the .45 actually expanding harder and cutting deeper.
The "expansion ÷ caliber" numbers above beg to differ.
Interestingly, the HST's show the .45 punching deeper and expanding more, putting the .45 as a clear winner in the HST comparison, and the GD's showing .45 better on clear gel, and an interesting question of tradable qualities on the IWBA clothing.
"Deeper"? In most cases, yes. The 147 gr. HST is only outpenetrated in bare gel by the 230 gr. +P load. As for "expanding more," let's do some math.
HST 9mm 124 gr.:
BG Exp. = .880" or ~2.478 x Cal.
IWBA Exp. = .580" or ~1.633 x Cal.
HST 9mm 124 gr. +P:
BG Exp. = .870" or ~2.450 x Cal.
IWBA Exp. = .640" or ~1.802 x Cal.
HST 9mm 147 gr.:
BG Exp. = .850" or ~2.394 x Cal.
IWBA Exp. = .660" or ~1.859 x Cal.
HST .45 ACP 230 gr.:
BG Exp. = .980" or ~2.168 x Cal.
IWBA Exp. = .800" or ~1.769 x Cal.
HST .45 ACP 230 Gr. +P:
BG Exp. = .980" or ~2.168 x Cal.
IWBA Exp. = .750" or ~1.659 x Cal.
Except in the case of the standard velocity 124 gr. load, the 9mm loads once again demonstrate better expansion than their .45 ACP counterparts. Additionally, the 147 gr. load passed the minimum penetration depth requirement in both BG and IWBA 4-layer denim testing. It also matched or exceeded the .45 ACP loads for penetration in steel, wallboard, plywood, and authomobile glass tests. Again, no one number tells the whole story.
My point still stands, that if the 147 expands to the same width as the 230, the 230 will punch deeper...
That's due to sectional density. Making any 9mm load expand like the best .45 loads would make them underpenetrate, which is undesirable. And yet, a well-designed and engineered 9mm performs admirably when fired through intermediate barriers. The penetration and retained weight numbers attest to that fact.
...and if they penetrate the same, you will get a bigger hole out of the 230.
Have any scientific evidence to show that bigger holes cause physiological stops faster than slightly smaller ones? We're talking differences of a tenth of an inch in most cases.
Simply put, the .45 will crush a wider path of the same distance, or a deeper path of the same width.
Not always. In some cases, the .45 doesn't penetrate as much as other loads, which reduces wound volume.
Apples to apples, the .45 comes out ahead.
In certain areas this is without dispute, but not ALL areas. For example, the .45 ACP more often than not falls behind the 9mm and .40 S&W in intermediate barrier testing if you're comparing penetration depths.
Find other research on other bullet types, especially improved bullets that are not designed to so radically expand, and you will continue to find similar results.
When time permits, I intend to compare the differences within the Winchester Ranger lines (e.g. Ranger-T, Ranger Bonded), but right now, my head hurts from doing all this math so you'll just have to wait.
