GlockTalk.com
Home Forums Classifieds Blogs Today's Posts Search Social Groups



  
SIGN-UP
Notices

Glock Talk
Welcome To The Glock Talk Forums.
Reply
 
Thread Tools Display Modes
Old 09-22-2012, 21:00   #1
pcmanic
Registered User
 
Join Date: Aug 2012
Posts: 7
Chamber support

Are the new Gen 4 .40 S&W chambers fully supported? I'd like to try some Buffalo Bore brand bullets but they warn not to shoot them in Gocks ....Rich
pcmanic is offline   Reply With Quote
Old 09-22-2012, 21:23   #2
dkf
Senior Member
 
dkf's Avatar
 
Join Date: Aug 2010
Posts: 4,298
You are not going to get a fully supported barrel for a Glock, well at least not one that will function. There is going to be an area at the feed ramp that is not going to have full support, just the way it is. The later .40 glock barrels like in your Gen 4 have more support than the older .40 barrels. If it were me I would shoot them one a time and examine the brass. A small convex portion near the unsupported part of the chamber is normal.

If you get something that looks like the pic below you do not want to shoot any more.
General Glocking
dkf is offline   Reply With Quote
Old 09-23-2012, 00:26   #3
DannyR
Moderator
 
DannyR's Avatar
 
Join Date: Dec 1998
Location: Roanoke, Virginia
Posts: 38,241
No semi-automatic has a 100% fully supported chamber. Having one would render the pistol a single shot, hand fed weapon, as ammo would not feed from a magazine into the chamber. Some barrels have more chamber support than others, but the trade off is sometimes reliability with all ammo.
__________________
Lifetime GSSF Member
Certified Glock Armorer 1997-2015
NROI, Level I
Bull Dawg #1
www.gssfonline.com
https://sites.google.com/site/dannyvickieryan
DannyR is offline   Reply With Quote
Old 09-23-2012, 13:35   #4
avenues165
Senior Member
 
avenues165's Avatar
 
Join Date: Jun 2012
Location: SLC, Utah
Posts: 428
I, too, have wondered about the safety of using a hot .40 load from vendors such as BB, DT, Underwood (I know about the chrono results folks have seen from DT).

BB states on their website that Glock OEM barrels are not to be used with their ammo. DT posts results using Glocks, Underwood doesn't say. Are the +p designations from some manufacturers a true indication of pressures that exceed SAAMI specs, or are they a marketing strategy?

It has been my practice to stay away from .40 "+p" loadings.
avenues165 is offline   Reply With Quote
Old 09-23-2012, 13:38   #5
TattooedGlock
NRA LIFE MEMBER
 
TattooedGlock's Avatar
 
Join Date: Jun 2006
Location: South Texas
Posts: 1,624
Underwood tests all their 10mm ammo in stock Glocks.
__________________
NRA Life Member
If you're a gun owner and not a member, you fail.

GSSF Life Member
1911 Club and Big Dawg Member
TattooedGlock is offline   Reply With Quote
Old 09-23-2012, 13:50   #6
M 7
Senior Member
 
M 7's Avatar
 
Join Date: May 2012
Posts: 1,002
Quote:
Originally Posted by dkf View Post
You are not going to get a fully supported barrel for a Glock, well at least not one that will function. There is going to be an area at the feed ramp that is not going to have full support, just the way it is. The later .40 glock barrels like in your Gen 4 have more support than the older .40 barrels. If it were me I would shoot them one a time and examine the brass. A small convex portion near the unsupported part of the chamber is normal.

If you get something that looks like the pic below you do not want to shoot any more.
General Glocking
Yikes.

Is that spent case from a gun that you fired?
__________________
For those who CCW: QUANTITATIVE AMMUNITION SELECTION
M 7 is offline   Reply With Quote
Old 09-23-2012, 14:19   #7
ctious
Senior Member
 
Join Date: Dec 2011
Posts: 535
Quote:
Originally Posted by dkf View Post
You are not going to get a fully supported barrel for a Glock, well at least not one that will function. There is going to be an area at the feed ramp that is not going to have full support, just the way it is. The later .40 glock barrels like in your Gen 4 have more support than the older .40 barrels. If it were me I would shoot them one a time and examine the brass. A small convex portion near the unsupported part of the chamber is normal.

If you get something that looks like the pic below you do not want to shoot any more.
General Glocking
I disagree. There are aftermarket that are fully supported and will function fine. It cause cause feeding problems. But it can be done. Most venders now just offer better support. Tig weld the ramp and recut it. U can get fully supported that way.
ctious is offline   Reply With Quote
Old 09-23-2012, 14:22   #8
TattooedGlock
NRA LIFE MEMBER
 
TattooedGlock's Avatar
 
Join Date: Jun 2006
Location: South Texas
Posts: 1,624
I just watched a vid showing Glock, Lonewolf, and a Storm Lake10 mm barrel and comparing the throat of each. They all covered the round exactly the same. The Glock was about 1/10th of a millimeter wider at the opening. Not a whole lot of difference.
__________________
NRA Life Member
If you're a gun owner and not a member, you fail.

GSSF Life Member
1911 Club and Big Dawg Member

Last edited by TattooedGlock; 09-23-2012 at 14:22..
TattooedGlock is offline   Reply With Quote
Old 09-23-2012, 14:47   #9
jeanderson
Platinum Membership
Toga!... Toga!
 
jeanderson's Avatar
 
Join Date: Apr 2012
Location: NE Ohio
Posts: 2,144
Here's one of several pics I found comparing .40 cal barrels. Older (1998) would appear to be less supported:
General Glocking
__________________
"I have obviously failed to galvanize and prod, if not shame enough Americans to be ever vigilant not to let a Chicago communist-raised, communist-educated, communist-nurtured subhuman mongrel like the acorn community organizer gangster Barack Hussein Obama to weasel his way into the top office of authority in the United States of America."

– Ted Nugent
jeanderson is online now   Reply With Quote
Old 12-15-2012, 07:48   #10
AquaHull
Senior Member
 
Join Date: Nov 2011
Location: West MI
Posts: 194
Nice pics, I'll have to look at my '06 model

My 19 looks in between the 98 G23 and 09 LWD barrel barrel

Last edited by AquaHull; 12-15-2012 at 07:53..
AquaHull is offline   Reply With Quote
Old 12-15-2012, 07:58   #11
ADK_40GLKr
Senior Member
 
ADK_40GLKr's Avatar
 
Join Date: Nov 2010
Location: RFD NY Adks
Posts: 2,127
Blog Entries: 2
Quote:
Originally Posted by avenues165 View Post
It has been my practice to stay away from .40 "+p" loadings.
There IS such a thing???
__________________
Luke 22:36 He said to them, “... if you don’t have a Glock, sell your cloak and buy one."

NRA, GSSF, IDPA, NY voter.
ADK_40GLKr is offline   Reply With Quote
Old 12-15-2012, 09:47   #12
SJ 40
Senior Member
 
SJ 40's Avatar
 
Join Date: Jan 2011
Location: Vermont
Posts: 6,370
Quote:
Originally Posted by ADK_40GLKr View Post
There IS such a thing???
There is No SAMMI specs for a 40 S&W + P ,so it would be a fly by the seat of the pants kind of thing,not something I'm interested in. SJ 40
SJ 40 is online now   Reply With Quote
Old 12-15-2012, 10:23   #13
clarkz71
Senior Member
 
clarkz71's Avatar
 
Join Date: Aug 2012
Location: South Florida
Posts: 1,606
Quote:
Originally Posted by pcmanic View Post
Are the new Gen 4 .40 S&W chambers fully supported? I'd like to try some Buffalo Bore brand bullets but they warn not to shoot them in Gocks ....Rich
Much better then they were, equal to LW barrel

Quote:
Originally Posted by ctious View Post
I disagree. There are aftermarket that are fully supported and will function fine. It cause cause feeding problems. But it can be done. Most venders now just offer better support. Tig weld the ramp and recut it. U can get fully supported that way.
Here's my G23 Gen3 March2012 production

Way more support then the old 98 & before barrels


General Glocking
__________________
Quote:
Originally Posted by Bill Lumberg View Post
Real Men of Genius....Here's to you, Mister self proclaimed-genius-surrounded by idiots!
.
G23 gen3 .40/.357 Sig
Florida Glocker #1923

Last edited by clarkz71; 12-15-2012 at 10:24..
clarkz71 is online now   Reply With Quote
Old 12-15-2012, 12:18   #14
dkf
Senior Member
 
dkf's Avatar
 
Join Date: Aug 2010
Posts: 4,298
Quote:
Originally Posted by ctious View Post
I disagree. There are aftermarket that are fully supported and will function fine. It cause cause feeding problems. But it can be done. Most venders now just offer better support. Tig weld the ramp and recut it. U can get fully supported that way.
Show me a fully supported aftermarket Glock barrel then. Maybe in a 1911 but not a Glock. You also contradict yourself saying the barrel will "function fine" and then say "can cause feeding problems". Which one is it. Sounds like you are talking out your rear. A gun that does not function reliablly is worthless to me in every application.

Last edited by dkf; 12-15-2012 at 12:20..
dkf is offline   Reply With Quote
Old 12-15-2012, 13:39   #15
diode
Senior Member
 
diode's Avatar
 
Join Date: Jan 2004
Location: transformerville
Posts: 716
Quote:
Originally Posted by clarkz71 View Post
Much better then they were, equal to LW barrel



Here's my G23 Gen3 March2012 production

Way more support then the old 98 & before barrels


General Glocking
I agree, Glock has changed the chamber to the point that a reliable feed and good safety appear to be accomplished in my later Gen g23. Any more support would be a revolver cylinder. jb
__________________
"No food, no water, no government..
Liberal America is only 3 to 4 days deep" D.A.G.
diode is offline   Reply With Quote
Old 12-15-2012, 13:55   #16
clarkz71
Senior Member
 
clarkz71's Avatar
 
Join Date: Aug 2012
Location: South Florida
Posts: 1,606
Quote:
Originally Posted by diode View Post
I agree, Glock has changed the chamber to the point that a reliable feed and good safety appear to be accomplished in my later Gen g23. Any more support would be a revolver cylinder. jb
For sure, I had 2 G23's back in 97, I couldn't believe how
much better the new ones were when I got this new Gen 3.
__________________
Quote:
Originally Posted by Bill Lumberg View Post
Real Men of Genius....Here's to you, Mister self proclaimed-genius-surrounded by idiots!
.
G23 gen3 .40/.357 Sig
Florida Glocker #1923
clarkz71 is online now   Reply With Quote
Old 12-15-2012, 14:06   #17
kodiakpb
Senior Member
 
kodiakpb's Avatar
 
Join Date: Jan 2012
Posts: 2,083
Here's a 2010 G23C RTF2

General Glocking
kodiakpb is offline   Reply With Quote
Old 12-15-2012, 17:03   #18
tonyparson
Senior Member
 
tonyparson's Avatar
 
Join Date: Jan 2008
Location: Dayton, TN.
Posts: 5,059
Here is the chamber support on my 1995 G24...

General Glocking
__________________
When the people fear their government, there is tyranny; when the government fears the people, there is liberty.......
Thomas Jefferson
tonyparson is offline   Reply With Quote
Old 12-15-2012, 17:37   #19
F106 Fan
Senior Member
 
F106 Fan's Avatar
 
Join Date: Oct 2011
Posts: 5,388
If the manufacturer says not to shoot their ammo in Glock barrels, why do you have a question?

Don't shoot their ammo in a Glock barrel!

Richard
__________________
"No matter how cynical you become, it's never enough to keep up." - Lily Tomlin
F106 Fan is offline   Reply With Quote
Old 12-15-2012, 20:05   #20
AustinTx
Senior Member
 
Join Date: Aug 2006
Location: Tx
Posts: 8,051
Quote:
Originally Posted by dkf View Post
You are not going to get a fully supported barrel for a Glock, well at least not one that will function. There is going to be an area at the feed ramp that is not going to have full support, just the way it is. The later .40 glock barrels like in your Gen 4 have more support than the older .40 barrels. If it were me I would shoot them one a time and examine the brass. A small convex portion near the unsupported part of the chamber is normal.

If you get something that looks like the pic below you do not want to shoot any more.
General Glocking
I have never had a barrel, in a 1911 that required a chamber that much oversize, to function. Why does Glock?
AustinTx is offline   Reply With Quote
Old 12-15-2012, 20:28   #21
nraman
Senior Member
 
nraman's Avatar
 
Join Date: Dec 2002
Posts: 1,189
Quote:
Originally Posted by diode View Post
I agree, Glock has changed the chamber to the point that a reliable feed and good safety appear to be accomplished in my later Gen g23. Any more support would be a revolver cylinder. jb
The new Glocks have all the support they need.
The unsupported part is solid brass, not case wall. The bottom of the case is solid. Solid brass is safe until you exceed rifle pressures.
I got rid of my earlier .40s and a 10mm for their lack of support. I like my Gen 4 G22s and G27. In addition to the excellent support, the Gen4 G22 has better feeling recoil thanks to the new spring.
__________________
Μολών λαβέ
nraman is offline   Reply With Quote
Old 12-15-2012, 20:37   #22
dkf
Senior Member
 
dkf's Avatar
 
Join Date: Aug 2010
Posts: 4,298
Quote:
Originally Posted by AustinTx View Post
I have never had a barrel, in a 1911 that required a chamber that much oversize, to function. Why does Glock?
That was not my pic. That pic was one of those hot "fully supported barrel only" 10mm loads shot out of an older 10mm barrel if memory serves me right.

Even the 1911 guys run into support issues trying to make major with .38super. The ramped 1911 barrel is about as close as I have seen to full support.
http://38super.net/Pages/Major.html
http://38super.net/Pages/supported.html

It is not that the older Glock barrels were oversized. They just were generous in the amount of chamfer at and around the top of the feed ramp to help ensure reliable feeding. Some guns have worse support than even the older Glocks.

Last edited by dkf; 12-15-2012 at 20:53..
dkf is offline   Reply With Quote
Old 12-15-2012, 20:40   #23
SargeMO
Senior Member
 
SargeMO's Avatar
 
Join Date: Jun 2007
Posts: 412
Quote:
Originally Posted by jeanderson View Post
Here's one of several pics I found comparing .40 cal barrels. Older (1998) would appear to be less supported:
General Glocking
LOL... I thought I was going to have to find that photo and re-post, but you beat me to it. Here's the money quote and a link to the whole article.

Quote:
I have long contended that Glock, who will never admit there was a chamber-support problem in the first place, made subtle changes to mitigate this problem. You take a look and decide for yourself.



__________________
Sarge

PS- if you're being a retard, don't expect a reply.
SargeMO is offline   Reply With Quote
Old 12-15-2012, 21:06   #24
tonyparson
Senior Member
 
tonyparson's Avatar
 
Join Date: Jan 2008
Location: Dayton, TN.
Posts: 5,059
Quote:
Originally Posted by SargeMO View Post
LOL... I thought I was going to have to find that photo and re-post, but you beat me to it. Here's the money quote and a link to the whole article.
Thay had to add more chamber support because people couldn't follow what Glock says about not shooting reloads through them. I have a 1995 G24 and I don't worry at all about the chamber support because I won't shoot reloads through it. All kbooms are ammo related. When people have a kboom with reloads they always blame the gun not there reloaded ammo.
__________________
When the people fear their government, there is tyranny; when the government fears the people, there is liberty.......
Thomas Jefferson

Last edited by tonyparson; 12-15-2012 at 21:09..
tonyparson is offline   Reply With Quote
Old 12-15-2012, 21:17   #25
dkf
Senior Member
 
dkf's Avatar
 
Join Date: Aug 2010
Posts: 4,298
You can have kabooms with factory ammo too. I have read old articles that blamed bullet setback as a main cause for many .40 kabooms. I would wager that there has been hundreds of millions of rounds of reloaded .40 through those older barrels.

Last edited by dkf; 12-15-2012 at 21:19..
dkf is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump




All times are GMT -6. The time now is 14:18.



Homepage
FAQ
Forums
Calendar
Advertise
Gallery
GT Wiki
GT Blogs
Social Groups
Classifieds


Users Currently Online: 1,330
387 Members
943 Guests

Most users ever online: 2,244
Nov 11, 2013 at 11:42