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Old April 2nd, 2012, 11:24 AM #1
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Sig P229 - .357 vs .40 cal

Hello ammo experts. I recently ordered a new Sig P229 .40 cal. When the pistol arrived at my FFL I found out they shipped it with a .357 barrel. it took almost 2 months for it to arrive with the MD required spent casing. Dring the wait I bought $500 worth of .40 cal ammo. the dealer I bought the gun from offered to either replace the pistol or sell me the .40 cal barrel at his cost ($140).

I ended up keeping the .357 and ordering the .40 cal barrel. So here's my question...

besides cost; what are the differences I should expect between the two rounds? any thoughts on which is better and for what purpose? Does anyone have any metrics on the quantitative differences in energy, muzzle velocity, etc.

I'm very new to shooting so please forgive me if this is a dumb question.

thanks.
John
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Old April 2nd, 2012, 11:34 AM #2
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If you do a search on the web site you will find everthing you have asked about.....:-).
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Old April 2nd, 2012, 11:49 AM #3
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Quote:
Originally Posted by Maverick0313 View Post
If you do a search on the web site you will find everthing you have asked about.....:-).
what he said.. or go to the ammo manufacturers website and most of them have the information on the rounds.
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Old April 2nd, 2012, 12:35 PM #4
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Should have gotten 9mm ;-)
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Old April 2nd, 2012, 12:59 PM #5
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I've been reading through the search results I've found so far and most seem to state that ".40 cal Ghey"

I haven't really been able to locate a good comparison or slightly less biased information.

I've heasitated from the manufacturer's sites since their info will vary from load to load within the same caliber.
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Old April 2nd, 2012, 01:09 PM #6
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The Wiki for .40 and .357Sig don't show a lot of difference to me. I'm sure there are fans of the .357 Sig, but I never got the point to the round. The .40 is a tamed down 10mm, somewhere between a 9mm and .45ACP. You are already in the thick of it now, so just go with it. In a SHTF .40 cal is used by LE, so you have similar ammo.
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Old April 2nd, 2012, 01:14 PM #7
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The .357 Sig is basically a hot 9mm round. It just happens to be a bottle-necked and shortened 10mm case with a small pistol primer. It was originally conceived to mimic the ballistics of the 125gr .357 Magnum round in a semi-automatic pistol. If you were around back when it was developed and paid attention to what was going on, you'd know this, but since this seems to be your first pistol, I'll cut you some slack The .40 S&W was the result of the FBI's request for a downloaded 10mm cartridge. This cartridge offers 180gr JHPs that is supposed to offer good barrier penetration in a smaller framed pistol format. Since the .40 has been adopted by a LOT of state, local, and federal law enforcement agencies, ammo is a lot less expensive and selection is a lot greater than the Sig cartridge.
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Old April 2nd, 2012, 01:24 PM #8
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I would have given you my .40 barrel.

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Old April 2nd, 2012, 01:25 PM #9
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The trajectory of the sig .357 is flatter at a greater distance.

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Old April 2nd, 2012, 01:27 PM #10
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Quote:
Originally Posted by outobie View Post
I've been reading through the search results I've found so far and most seem to state that ".40 cal Ghey"

I haven't really been able to locate a good comparison or slightly less biased information.

I've heasitated from the manufacturer's sites since their info will vary from load to load within the same caliber.
Search outside mds. Lol
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