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Old March 22nd, 2012, 11:33 PM #1
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why is 40 cal always flatnose

Yes, I know 40 cal is ghey. Why is most of the FMJ .40S&W ammo I see come in flat nose configuration? Why isn't it rounded like most 9mm FMJ? I thought flatnose ammo was really a design feature for tube magazines.
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Old March 22nd, 2012, 11:40 PM #2
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Maybe to make the over all length shorter?
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Old March 22nd, 2012, 11:51 PM #3
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Quote:
Originally Posted by mikec View Post
Maybe to make the over all length shorter?
Lord Clandestine probably has something to say about this.....
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Old March 23rd, 2012, 12:10 AM #4
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It's all flat nose so our Hi Point 4095 carbines will run it flawlessly.
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Old March 23rd, 2012, 12:21 AM #5
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Quote:
Originally Posted by Omega21
Why isn't it rounded like most 9mm FMJ? I thought flatnose ammo was really a design feature for tube magazines.
Yes, a "flat nose" meplat design is safest for use in a tube magazine, but it also has less tendency to over-penetrate and more shock power than a round nose design, and it adds slightly to the bullet weight.

Quote:
Originally Posted by mikec
Maybe to make the over all length shorter?
This is a semi-auto cartridge; if it was round-nosed, it would be the same length.
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Old March 23rd, 2012, 12:23 AM #6
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Quote:
Originally Posted by Omega21 View Post
Yes, I know 40 cal is ghey. Why is most of the FMJ .40S&W ammo I see come in flat nose configuration? Why isn't it rounded like most 9mm FMJ? I thought flatnose ammo was really a design feature for tube magazines.

The 40 Short & Wimpy is flat-nose for one simple reason, and that is because it is SO GHEY that it has taken all logic regarding projectile design and dismissed it as inconvenient.


Actually that is a question I'd like to have some light shed on if I'm honest, cause I don't have a clue.
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Old March 23rd, 2012, 12:47 AM #7
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I "heard" that it was to help distinguish 9mm from .40 at a glance. No idea if that's actually the reason, or even part of it, but it makes some sense.
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Old March 23rd, 2012, 12:48 AM #8
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Quote:
Originally Posted by BradMacc82 View Post
The 40 Short & Wimpy is flat-nose for one simple reason, and that is because it is SO GHEY that it has taken all logic regarding projectile design and dismissed it as inconvenient.


Actually that is a question I'd like to have some light shed on if I'm honest, cause I don't have a clue.
Listen piston puffer, you have no right to call anything ghey

Im sleep happy with my glock 22....in .40 i trust. Lol


Good question, have been curious myself.
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Old March 23rd, 2012, 12:58 AM #9
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have been curious myself.
So that's why you bought a .40 huh?
Handkerchiefs too passe for you?
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Old March 23rd, 2012, 01:12 AM #10
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Why 40 S&W has a flat nose

Hi,
Geat question! I've read that the reason why the 40 S&W is flat-nosed is to keep its over all length in the same neighborhood as the 9mm para (9X19). A round-nosed 40 S&W would be significantly longer than a 9mm, and require a mag with a front to rear length greater than would fit in a 9mm frame. Accordingly, by making 40 S&W flat-nosed, existing 9mm frame designs can be produced to handle this new cartridge without a lot of redesign and new tooling cost. This is why Sig, Glock and others use the same size frames for both calibers.
Regards,
John
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