fully supported chamber - XDTalk Forums - Your HS2000/SA-XD Information Source!

sewerman · 12-30-2005, 07:22 PM

does the XD .40 have a fully supported chamber?
i know that the steyr M series has a FSC and was designed as a .40 first then 9mm came later.
i believe the glock does not have this as well some other semi's offered in .40.
does this FSC offer a distinct advantage over partial supported chambers?

manic mechanic · 12-30-2005, 07:26 PM

Yes, all the XD's have fully supported chambers.

manic mechanic · 12-30-2005, 07:31 PM

I believe the glock 40 is not fsc. The reason it's a good thing is the KABOOM factor is taken out when the chamber is fully supported. If you get a chance to see a 40 shell that was fired from a glock it will exhibit the tell tale sign of being glocked. A bulge in the casing will be present.

JD McDorce · 12-30-2005, 07:43 PM

Quote:

Originally Posted by sewerman

does this FSC offer a distinct advantage over partial supported chambers?

Not when using factory ammo that adheres to the SAAMI pressure specifications for .40S&W and with cases adapted for use with chambers that are not fully supported.

gsh341 · 12-30-2005, 09:47 PM

Quote:

Originally Posted by JD McDorce

Quote:

Originally Posted by sewerman

does this FSC offer a distinct advantage over partial supported chambers?

Not when using factory ammo that adheres to the SAAMI pressure specifications for .40S&W and with cases adapted for use with chambers that are not fully supported.

Basically, a fully supported chamber completely encloses the casing of the round in the chamber, thus lending the chamber's strength to the casing. This means that a round with a weak casing wall, or a higher pressure round will not inadvertantly rupture and damage your pistol. I find that VERY comforting. Just ask anyone that has had a Glock kaboom on them if they would have liked a fully supported chamber at the time.

sewerman · 12-31-2005, 04:06 AM

thanks for all the infomation about the fully supported chamber

if the unsupported chamber poses a hazard then why would arms manufacturers produce such a design? could it be to reduce weight?
just trying to understand the reasoning behind such a design

i have a glock 17. got it at a great price out the door nib $426.00.
my first poly frame.

bought a XD 9 for my son for christmas.
sorry to say i like XD better.

but back to this FSC discussion...............
so do all glocks have USC or just the .40 ?

gsh341 · 12-31-2005, 04:32 PM

Maybe the feed ramp is at a shallower angle and cuts into the chamber area a little. I never really checked. That would help with feeding ammo, but that's all I can think of. Anyone with a Glock care to check?

k8ysv · 01-09-2006, 06:37 AM

Quote:

Originally Posted by gsh341

Maybe the feed ramp is at a shallower angle and cuts into the chamber area a little. I never really checked. That would help with feeding ammo, but that's all I can think of. Anyone with a Glock care to check?

This is correct. it's done this way to improve feeding, which can be troublesome if you use truncated cone type bullets in .40 (range ammo and certain SD loads, like Hydrashocks).

Glock recommends ONLY factory NEW ammo, loaded to SAAMI / NATO specs. If you follow these recommendations, a fully supported chamber is not necessary. The area of the cartridge that's NOT supported is also the thickest part of the case. In the thousands of .40 rounds I've fired from my G23 and G27, I've never had a KB, nor have any of my spent cases been misshapen or bulged in any way.

Kabooms are the result of one or more of the following:

Using reloaded .40 ammunition using previously fired brass in a Glock.

Using soft lead bullets and not cleaning the barrel regularly to remove lead
fouling.

Using hot or otherwise overpressure loads.

Defective factory ammunition.

Of all the Kaboom stories I've ever read or heard firsthand, only ONE of them occurred using factory new ammo. It was S&B and it was double charged - a mistake at the factory. In all cases, the magazine blew out the magwell and there were no serious injuries. In the case of the overloaded S&B, the whole rear of the casing blew out and the frame split, but nothing specific to the chamber was noted.

JD McDorce · 01-09-2006, 06:56 AM

Quote:

Originally Posted by k8ysv

It was S&B and it was double charged

Out of curiousity, how were they able to tell that the round was double charged?

NiK · 01-09-2006, 07:38 AM

Quote:

Originally Posted by gsh341

Basically, a fully supported chamber completely encloses the casing of the round in the chamber, thus lending the chamber's strength to the casing. This means that a round with a weak casing wall, or a higher pressure round will not inadvertantly rupture and damage your pistol. I find that VERY comforting. Just ask anyone that has had a Glock kaboom on them if they would have liked a fully supported chamber at the time.

Incidentally, this thread resurrection reminded me of something that happened to a good friend of mine recently.

He was given a 9mm Beretta CX4 Storm for Christmas. First time at the range, he'd fired about 2 mags, then all of a sudden KABOOM. Shredded the trigger assembly and blew a whole in the side of the receiver. I haven't seen pictures, but my friend said he retrieved the offending round and there is a hole in the casing, bullet still seated. They were using Fiocchi ammo.

Any thoughts? I'm really going to try and persuade him to take pics, at which time I'll start a new thread and post them.

12-30-2005, 07:22 PM	#1
sewerman XDTalk 100 Member Join Date: Dec 2005 Location: hurricane alley,florida Posts: 225	fully supported chamber does the XD .40 have a fully supported chamber? i know that the steyr M series has a FSC and was designed as a .40 first then 9mm came later. i believe the glock does not have this as well some other semi's offered in .40. does this FSC offer a distinct advantage over partial supported chambers? __________________ the armed citizen prevents tyranny "They that can give up an essential liberty to obtain a little temporary safety, deserve neither liberty nor safety!" Ben Franklin "When the government fears the people, there is liberty. When the people fear the government there is tyranny!" Thomas Jefferson my job smells like poop, but it's bread and butter to me!

12-30-2005, 07:26 PM	#2
manic mechanic XDTalk 1K Member Join Date: Jun 2005 Location: michigan, down the river Posts: 1,128	Yes, all the XD's have fully supported chambers. __________________ The 2nd amendment makes all the others possible. If we ever forget that we're One Nation Under God, then we will be a nation gone under." Ronald Reagan

12-30-2005, 07:31 PM	#3
manic mechanic XDTalk 1K Member Join Date: Jun 2005 Location: michigan, down the river Posts: 1,128	I believe the glock 40 is not fsc. The reason it's a good thing is the KABOOM factor is taken out when the chamber is fully supported. If you get a chance to see a 40 shell that was fired from a glock it will exhibit the tell tale sign of being glocked. A bulge in the casing will be present. __________________ The 2nd amendment makes all the others possible. If we ever forget that we're One Nation Under God, then we will be a nation gone under." Ronald Reagan

12-31-2005, 04:06 AM	#6
sewerman XDTalk 100 Member Join Date: Dec 2005 Location: hurricane alley,florida Posts: 225	FSC thanks for all the infomation about the fully supported chamber if the unsupported chamber poses a hazard then why would arms manufacturers produce such a design? could it be to reduce weight? just trying to understand the reasoning behind such a design i have a glock 17. got it at a great price out the door nib $426.00. my first poly frame. bought a XD 9 for my son for christmas. sorry to say i like XD better. but back to this FSC discussion............... so do all glocks have USC or just the .40 ? __________________ the armed citizen prevents tyranny "They that can give up an essential liberty to obtain a little temporary safety, deserve neither liberty nor safety!" Ben Franklin "When the government fears the people, there is liberty. When the people fear the government there is tyranny!" Thomas Jefferson my job smells like poop, but it's bread and butter to me!

12-31-2005, 04:32 PM	#7
gsh341 XDTalk 2K Member Join Date: Oct 2004 Location: Sioux Falls, SD Posts: 2,145	Maybe the feed ramp is at a shallower angle and cuts into the chamber area a little. I never really checked. That would help with feeding ammo, but that's all I can think of. Anyone with a Glock care to check? __________________ "For those of us who exercised our privilege to serve our country, I can honestly say we did it proudly and shared a common bond of patriotism that those who were unwilling to answer our country's call will never understand or appreciate." - Dennis Foell

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