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Old 10-20-2011, 01:44 PM   #11
lkd
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I am going to get beat down for heresy, but...

The .40 S&W does not differ that much, in terms of ballistics, from the 10mm.

Here's some data from DoubleTap. I've jiggled it to line up the grain weights. The numbers at the end are inches of penetration and expansion

.40 : 135gr. Nosler JHP @ 1375fps - 12.10" / .72"
10mm : 135gr JHP @ 1600fps - 11.0" / .70" frag

.40 : 155gr Gold Dot JHP @ 1275fps - 13.00" / .76"
10mm : 155gr Gold Dot JHP @ 1475fps - 13.5" / .88"

.40 : 165gr Gold Dot JHP @ 1200fps - 14.0" / .70"
10mm : 165gr Gold Dot JHP @ 1400fps - 14.25" / 1.02"

.40 : 180gr Gold Dot JHP @ 1100fps - 14.75" / .68"
10mm : 180gr Gold Dot JHP @ 1300fps - 15.25" / .96"

.40 : 200gr XTP @ 1050fps - 17.75" / .59"
10mm : 200gr XTP @ 1250fps - 19.5" / .72"

Given the newer powders like Titegroup, it's very possible to meet or exceed the 10mm in terms of FPS/penetration, but far be it from me to recommend exceeding SAMMI pressure envelopes .

I'm quite content with the .40, myself.

BTW, unless you're shooting 230gr rounds, the .45 underperforms both the .40 and the 10mm. However, ALL these calibers are perfectly suitable as defensive rounds, so this is really a "How many angels can fit on the head of a pin" kind of discussion.

See? I told you I'd commit blasphemy

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Old 10-20-2011, 09:51 PM   #12
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Quote:
Originally Posted by Olympus View Post
.38 Super would still not be able to reach the ballistics of a 10mm.
.38S will deliver 540 ft-lbs of muzzle energy, nearly as good as the best .45ACP defense rounds. If that won't do the job, you need to rent a cannon.

38 Super Ballistics Chart | Ballistics 101
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Old 10-20-2011, 09:52 PM   #13
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Quote:
Originally Posted by lkd View Post
I am going to get beat down for heresy, but...

The .40 S&W does not differ that much, in terms of ballistics, from the 10mm.
Or from Saint John's master creation, the .45 ACP.

http://www.ballistics101.com/45_acp.php
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Old 10-22-2011, 04:45 AM   #14
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Another consideration is ammo availability, selection and cost.

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