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Discussion Starter · #1 ·
Doing some research I found that the .357 Cal XD can shoot .40 with no issue. All that needs to be done is swapping in a .40 barrel. They also say .40 mags into a .357 work without issue.

Can anyone verify this?
 

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Good to know
 

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This works with Glock as well. 40 cal mags will hold 357 and vice versa. All one needs to do is swap the barrel out. The 357 sig is actually a 40 cal shell crimped to fit a 9mm projectile.
 

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Discussion Starter · #4 ·
luckystrike said:
This works with Glock as well. 40 cal mags will hold 357 and vice versa. All one needs to do is swap the barrel out. The 357 sig is actually a 40 cal shell crimped to fit a 9mm projectile.
Exactly as I remembered it. Just didnt know if there were adverse effects.

Now to find a .357 XD :D
 

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I've owned 2 357 sig Glocks, one was the 32 the other a 33. Great caliber there's no doubt about that but the sound that it makes its ear popping. Believe me, even with ear plugs in, you're bound to go deaf just shooting that thing too much. If you ever had to use the 357 sig in self defense you would probably suffer irreversible ear damage, as would everyone around you. I myself have opted for the 45 because no matter what round of sig you are using, it is most likely to penetrate through a person and hit someone else as well.
 

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Discussion Starter · #9 ·
luckystrike said:
I've owned 2 357 sig Glocks, one was the 32 the other a 33. Great caliber there's no doubt about that but the sound that it makes its ear popping. Believe me, even with ear plugs in, you're bound to go deaf just shooting that thing too much. If you ever had to use the 357 sig in self defense you would probably suffer irreversible ear damage, as would everyone around you. I myself have opted for the 45 because no matter what round of sig you are using, it is most likely to penetrate through a person and hit someone else as well.
Very good point and I do agree to some extent.

However..If I was using it in self defense, I would rather walk away with slight hearing impairment versus my life. The other thing I was thinking, if I decided to carry .40 for self defense, load some corbons in .40cal and swap the barrel, problem solved.
 

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NotSoSimple said:
Doing some research I found that the .357 Cal XD can shoot .40 with no issue. All that needs to be done is swapping in a .40 barrel. They also say .40 mags into a .357 work without issue.

Can anyone verify this?
The .40 cal casings are just necked down to .357. This is why the only need the barrel change. The mags still work because the casings of both calibers have the same major diameter.
 

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Most .40 S&W pistols can be converted to .357 SIG by replacing the barrel, and sometimes the recoil spring. Pistols with especially strong recoil springs can accept either cartridge with a barrel change. Magazines will freely interchange between the two cartridges in most pistols, though there are exceptions like the 357 SIG chambered Sig 239. .357 SIG barrel kits have allowed this cartridge to gain in popularity among handgun owners. However, the .357 SIG is loaded to higher pressures than the .40 S&W (a difference of up to 5,000 psi at top loads), and may not be suitable for use in all .40 S&W-chambered pistols.

One disadvantage of the .357 SIG is that it fires a .355" bullet at higher velocities than most bullets of that caliber are designed for. Very few bullets have been designed specifically for the .357 SIG, and .357 Magnum bullets that are designed for the same velocity range cannot be used due to their slightly larger diameter. Because of this, there are fewer ammunition choices in .357 SIG than one might expect for a cartridge using .355" bullets.

Another drawback of the .357 SIG is its often harsh treatment of the pistols that are chambered for it. Many are designed to fire the .40 S&W and are later modified for use with the .357 SIG. Firing regularly at pressure levels effectively beyond what the pistol was originally engineered for tends to translate to accelerated wear on the firearm.
 

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GeneticsDave said:
However, the .357 SIG is loaded to higher pressures than the .40 S&W (a difference of up to 5,000 psi at top loads), and may not be suitable for use in all .40 S&W-chambered pistols.

Another drawback of the .357 SIG is its often harsh treatment of the pistols that are chambered for it. Many are designed to fire the .40 S&W and are later modified for use with the .357 SIG. Firing regularly at pressure levels effectively beyond what the pistol was originally engineered for tends to translate to accelerated wear on the firearm.
First off I'd just like to say that you had a very good post. I would like to add one thing to support your point on pressure. Part of the reason for the higher psi is the slope of the shoulder after being necked down from the .40 casing. It makes for more space for the gasses to bottle neck.
Secondly I would like to echo your comments on the extra stress on the firearm itself. Very well said.
 

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Discussion Starter · #13 ·
howlingwolfarms said:
First off I'd just like to say that you had a very good post. I would like to add one thing to support your point on pressure. Part of the reason for the higher psi is the slope of the shoulder after being necked down from the .40 casing. It makes for more space for the gasses to bottle neck.
Secondly I would like to echo your comments on the extra stress on the firearm itself. Very well said.
Thanks for the info guys. Ive also heard of the added pressure, but with routine maintenance wouldnt that prevent any critical failure? My plan is to shoot .357 sig on a regular basis to train, but .40 when I am sport shooting and just having a good time.

I called up two guys in Oregon who I know have .357 sig. Once is actually an officer who puts atleast 200 rounds a week through it. He said he has never had any issues at all.
 

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My plan is to shoot .357 sig on a regular basis to train, but .40 when I am sport shooting and just having a good time.
Which caliber are you going to CCW with? If it is the it is the .357sig then yes train with it. I believe the XD is strong enough to take it. It is well made and strong and if you bought the .357 to start with then it was meant for that caliber from the factory.
 

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Discussion Starter · #15 ·
howlingwolfarms said:
My plan is to shoot .357 sig on a regular basis to train, but .40 when I am sport shooting and just having a good time.
Which caliber are you going to CCW with? If it is the it is the .357sig then yes train with it. I believe the XD is strong enough to take it. It is well made and strong and if you bought the .357 to start with then it was meant for that caliber from the factory.
I would like to carry .357.
 

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I would like to carry .357.
I would train with the .357 but keep in mind that you should watch the ammo amount you put through it at one time. 1000 rounds per month would be fine with the .40 but would be stressful to the gun with the .357. However even the 200 rounds a week your friend puts through his should be ok.
 
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