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 09-26-2012, 20:27   #51
BruceO
Member
 
Join Date: Jun 2002
Posts: 99
You also erode the shoulder in the chamber, among other things. The only bad things are not just the possibility of a catastrophic failure although that may be sole concern of some.

http://thegunzone.com/10v40.html
__________________
Bruce

Last edited by BruceO; 09-26-2012 at 20:30..
BruceO is offline   Reply With Quote
Old 09-27-2012, 00:23   #52
dm1906
Retired SO
 
dm1906's Avatar
 
Join Date: Sep 2010
Location: PRK (Kalifornia)
Posts: 428
Quote:
Originally Posted by BruceO View Post
You also erode the shoulder in the chamber, among other things. The only bad things are not just the possibility of a catastrophic failure although that may be sole concern of some.

http://thegunzone.com/10v40.html
Erosion is no more likely than with any other cartridge, correct or not. And the article does not refer to Glock pistols. We've repeated, over and over again, this should not be tried in any other brand pistol. I'm NOT trying to convince anyone to try anything they are not absolutely comfortable with, or that may be unsafe. Only trying to dispel myth and rumor regarding THIS situation. The Glock doesn't know the difference, nor does it care. A .40 round won't fire (any more likely than if it were a 10mm round) if it's isn't properly chambered (either would be equally bad). Other pistols, such as those in the article, may. If the Glock does, it was already broken, or modified in such a way this should never be attempted (such as an extended striker, which is a bad mod, in almost any case).
__________________
Life is tough. It's tougher if you're stupid. -- The Duke
dm1906 is offline   Reply With Quote
Old 09-27-2012, 17:51   #53
BruceO
Member
 
Join Date: Jun 2002
Posts: 99
Quote:
Erosion is no more likely than with any other cartridge, correct or not. And the article does not refer to Glock pistols.
Yah, right.

It doesn't mention the Glock by name because it's a general statement.

Anyway...................
__________________
Bruce
BruceO is offline   Reply With Quote
Old 09-27-2012, 20:29   #54
Yondering
Senior Member
 
Join Date: Dec 2011
Posts: 562
It's funny how some people will argue against doing this, despite all logical explanations, without having a clue what they're talking about. If you don't understand why this can be done in a Glock but shouldn't be done in other pistols, fine, but quit acting like you're smarter than the rest of us - you aren't. Open your mind and look at the facts, and quit going off old rumors.

Throat and chamber erosion is no different firing 40 vs 10mm - it's practically non-existent with either round; these aren't magnum rifle rounds with large powder volumes and small bores.
Yondering is offline   Reply With Quote
Old 09-30-2012, 14:10   #55
Javelin
Silver Membership
Got Glock?
 
Javelin's Avatar
 
Join Date: Feb 2008
Location: N. Dallas
Posts: 14,638


Quote:
Originally Posted by Yondering View Post
It's funny how some people will argue against doing this, despite all logical explanations, without having a clue what they're talking about. If you don't understand why this can be done in a Glock but shouldn't be done in other pistols, fine, but quit acting like you're smarter than the rest of us - you aren't. Open your mind and look at the facts, and quit going off old rumors.

Throat and chamber erosion is no different firing 40 vs 10mm - it's practically non-existent with either round; these aren't magnum rifle rounds with large powder volumes and small bores.
Yeah because that extra 3mm of brass on the 10mm casing and barrel chamber is just there for aesthetics anyway......
__________________
Disclaimer: This writer is not a lawyer. This product is meant for entertainment and fan or political fiction purposes only and writer accepts no liability. All material should be considered as infotainment only. Writer does not own any characters, topics or subject matter in this story. Any resemblance to real persons, living or dead is for entertainment only. If rash, irritation, redness, or swelling develops, discontinue reading immediately and consult your physician.
Javelin is offline   Reply With Quote
Old 09-30-2012, 15:13   #56
dm1906
Retired SO
 
dm1906's Avatar
 
Join Date: Sep 2010
Location: PRK (Kalifornia)
Posts: 428
Quote:
Originally Posted by BruceO View Post
Yah, right.

It doesn't mention the Glock by name because it's a general statement.

Anyway...................
Right. It is/was a general statement, general to the pistols examined, which didn't include Glock. The reasons for the failures they describe are not characteristic of the function of a Glock pistol. I/we do not recommend this practice in pistols other than Glock for the reasons they describe. Please provide a source describing a Glock failure, under these conditions. If it's happened, it's a big secret.
__________________
Life is tough. It's tougher if you're stupid. -- The Duke
dm1906 is offline   Reply With Quote
Old 09-30-2012, 15:43   #57
Ebb27
Senior Member
 
Ebb27's Avatar
 
Join Date: Nov 2003
Location: East of the mountains
Posts: 2,828
Quote:
Originally Posted by copo9560 View Post
I have tried the experiment and had no issues - maybe I was lucky. Better question is does anyone have any documented proof of a G20 blown up by using 40S&W? I can see beating up the extractor but that is easy enough to change. There appear to be a lot of guys trying this - curious if anyone has really had a bad experience.

Well I know a lot of folks like drama but both rounds are similiar CUP pressure with the 10mm being a bit higher.

So it's not likely you're gonna get some catastrophic failure that causes the pistol to blow-up like a pipe-bomb by using a shorter lower pressure round.


At most you'll damage the extractor, or the round will slip past the extractor and fail to fire.
__________________
A Glock in the hand,
is worth two in the safe.
Ebb27 is offline   Reply With Quote
Old 10-01-2012, 11:48   #58
Spring Hill Glocker
Registered User
 
Join Date: Jul 2012
Location: florida
Posts: 13
Someone make a YouTube video about this maybe moss pawnshop channel will do a special I do know you can buy caliber inserts for a 12 Gauge and shoot 9mm 22lr 357 out of it safely but I can't comment on the accuracy but if it comes down to you finding assorted ammo and only a shot gun these inserts would be a heaven send in a crisis.
Spring Hill Glocker is offline   Reply With Quote
Old 10-01-2012, 11:59   #59
ithaca_deerslayer
Senior Member
 
ithaca_deerslayer's Avatar
 
Join Date: Jul 2000
Location: Upstate NY, USA
Posts: 18,603
Cool thread.

Maybe reason enough to buy a 10mm now
ithaca_deerslayer is offline   Reply With Quote
Old 01-19-2013, 08:42   #60
vaquero aleman
US ARMY 63D20H8
 
vaquero aleman's Avatar
 
Join Date: Jan 2009
Location: On the other side of the tracks
Posts: 686
I'll up your ante,

I have a G21, in which I placed a factory G20 6" barrel, and fired some 40 S&W. I use a Wolff guide rod with #20 spring. I shot Underwood 165gr 40 for a few rounds and then tried some Underwood 135gr 40. I threw away the first three rounds, of the 135gr, because they did not ignite. The pin had obviously punched the primer but did not ignite it. The 165gr fired without incident but the 135gr would not fire and I can only assume it was because the extractor could not hold the case against the breech solidly enough. Therefore, I intend to get a 10 to 40 conversion barrel to use in my G21. And I did perform the "KKM" mod to the extractor.

And, I must add, that there is no "why" only "just because".

The 10 Ring

The 10 Ring

The 10 Ring

The 10 Ring

The 10 Ring
__________________
G2930SF(.460 Rowland), The 21 Club #7663, The 10 Ring #7663.

http://www.glocktalk.com/forums/show....php?t=1474601
___________________________________________
Amateur Glock Modification Expert...

Last edited by vaquero aleman; 01-23-2013 at 10:00..
vaquero aleman is offline   Reply With Quote
Old 01-19-2013, 14:55   #61
Slateman
Senior Member
 
Join Date: Aug 2005
Posts: 161
So I can shoot .40S&W, no problem with stock barrel and mags?
Slateman is online now   Reply With Quote
Old 01-19-2013, 16:04   #62
vaquero aleman
US ARMY 63D20H8
 
vaquero aleman's Avatar
 
Join Date: Jan 2009
Location: On the other side of the tracks
Posts: 686
I loaded the 40 into factory G20 mags, which of course fit in my G21 because the frame is the same as the G20, and other than a little sliding back and forth in the mags, of the cartridges, there appeared to be no problems. Of course these are just my results.

I am in no way warranting the use of 40 S&W in a Glock 20 or 21, it is a personal choice. Do so at your own risk.

And don't tell Gaston about it, they are kinda fussy about those things.
__________________
G2930SF(.460 Rowland), The 21 Club #7663, The 10 Ring #7663.

http://www.glocktalk.com/forums/show....php?t=1474601
___________________________________________
Amateur Glock Modification Expert...

Last edited by vaquero aleman; 01-21-2013 at 09:56..
vaquero aleman is offline   Reply With Quote
Old 01-27-2013, 10:58   #63
gofastman
Senior Member
 
Join Date: Jan 2010
Location: MN
Posts: 497
Can .40 be shot out of a stock 10mm EAA Witness?
__________________
You have reached the end of the internet.
Now go outside and play.

Last edited by gofastman; 01-27-2013 at 11:00..
gofastman is offline   Reply With Quote
Old 01-27-2013, 17:50   #64
Any Cal.
Senior Member
 
Join Date: Oct 2008
Posts: 440
Look at it and see. You want to be sure that the firing pin can't hit the primer if the case is ahead of the extractor, which would allow the gun to fire out of battery. You also want to be sure that the extractor is heavy enough to take the force of the firing pin strike repeatedly. I have heard of one person who did what you are suggesting, but have no experience at all with that pistol, so could not say whether it is safe or not.
Any Cal. is offline   Reply With Quote
Old 01-27-2013, 20:06   #65
Yondering
Senior Member
 
Join Date: Dec 2011
Posts: 562
Quote:
Originally Posted by gofastman View Post
Can .40 be shot out of a stock 10mm EAA Witness?
It is not a good idea. Just like a 1911 and most other 10mm pistols, the firing pin is long enough to set off the round, even if it is in front of the extractor. This causes the case to slam back against the breech face, and sometimes results in case bulges and possibly ruptures. You'll also notice a spot where the case rim gets sheared off, as it's forced past the extractor (towards the rear) at high speed.

The Glock is the only gun I know of where this is a safe practice.

I will admit to doing this with my Witness back when I had one, to find out what it would do, and have never seen or heard of damage to a gun or shooter from it, but just judging from the appearance of the brass, I wouldn't do it any more.

In the Witness, when (not if) a round jumps the extractor, you'll see fired brass like this:
The 10 Ring

Last edited by Yondering; 01-27-2013 at 20:09..
Yondering is offline   Reply With Quote
Old 01-28-2013, 10:09   #66
RMM
Member
 
RMM's Avatar
 
Join Date: Nov 2012
Posts: 65
Just thought I'd stop in and report my experience.

Gun: Gen 3 G20SF (2012), stock barrel, stock recoil assembly.
Ammo: Federal Champion 40 S&W, PMC 200 gr. 10MM.

Was shooting at a ~8" bullseye target at 10 yards. All rounds chambered and fired without any problems. However, the accuracy seems to have suffered significantly. I fired 10 rounds of 10mm, all rounds grouped ~3". I then shot 10 rounds of the 40 S&W, all rounds hit ~4" lower than the 10MM rounds and had an ~8" group. Thinking that I was probably just nervous, I put out a new target and tried again. 10 rounds 10MM, followed by 10 rounds 40 S&W. The results were similar, I didn't see any keyholing but the grouping was definitely low and loose.

Nice to know that the 40 S&W will work in a pinch with the stock barrel, but I'm not going to make a regular practice out of it.
RMM is offline   Reply With Quote
Old 01-28-2013, 10:28   #67
Bren
NRA Life Member
 
Bren's Avatar
 
Join Date: Jan 2005
Location: Kentucky
Posts: 33,420
Quote:
Originally Posted by glock_19guy1983 View Post
This. 10mm headspaces on the case mouth, running a 40S&W case in a 10mm chamber means that the extractor is the only thing holding it in.
Yep, it will work until it doesn't. I'm not sure, but I would think it could result in the case head separating and some brass and crap blowing out of every hole, sooner or later.
__________________
Open carry activists are to gun rights what the Westboro Baptist Church is to free speech.

Last edited by Bren; 01-28-2013 at 10:29..
Bren is online now   Reply With Quote
Old 01-28-2013, 11:32   #68
ScottieG59
Senior Member
 
ScottieG59's Avatar
 
Join Date: Jan 2011
Location: Rural area near Kansas City, KS
Posts: 967
It is not difficult to use a conversion barrel. I use a Lone Wolf 10mm-40S&W conversion barrel and the original 10mm mags.
ScottieG59 is offline   Reply With Quote
Old 01-28-2013, 19:25   #69
Grizzz
Member
 
Grizzz's Avatar
 
Join Date: Nov 2011
Location: Ko-Kwill Or.
Posts: 32
Sooo your saying i can get a g20 / 10mm conv. to 40s&w & shoot it in my g21 slide ?
Quote:
Originally Posted by vaquero aleman View Post
I'll up your ante,

I have a G21, in which I placed a factory G20 6" barrel, and fired some 40 S&W. I use a Wolff guide rod with #20 spring. I shot Underwood 165gr 40 for a few rounds and then tried some Underwood 135gr 40. I threw away the first three rounds, of the 135gr, because they did not ignite. The pin had obviously punched the primer but did not ignite it. The 165gr fired without incident but the 135gr would not fire and I can only assume it was because the extractor could not hold the case against the breech solidly enough. Therefore, I intend to get a 10 to 40 conversion barrel to use in my G21. And I did perform the "KKM" mod to the extractor.

And, I must add, that there is no "why" only "just because".

The 10 Ring

The 10 Ring

The 10 Ring

The 10 Ring

The 10 Ring
__________________
Ride hard, Shoot Straight & Speak the Truth = Jeff Cooper :supergrin:
Grizzz is offline   Reply With Quote
Old 01-28-2013, 19:48   #70
vaquero aleman
US ARMY 63D20H8
 
vaquero aleman's Avatar
 
Join Date: Jan 2009
Location: On the other side of the tracks
Posts: 686
I don't see why the 10mm to 40 conversion barrel wouldn't work, but I am not an expert or gunsmith. I very well intend to get a conversion barrel for my 21. I would rather have it and not need than the other way around. 40 S&W is easier to find than 10mm for sure. And, in most cases, cheaper. I picked up a 100 round value box of Rem 40 at walmart when everything else was sold out.
__________________
G2930SF(.460 Rowland), The 21 Club #7663, The 10 Ring #7663.

http://www.glocktalk.com/forums/show....php?t=1474601
___________________________________________
Amateur Glock Modification Expert...
vaquero aleman is offline   Reply With Quote
Old 01-28-2013, 20:00   #71
Grizzz
Member
 
Grizzz's Avatar
 
Join Date: Nov 2011
Location: Ko-Kwill Or.
Posts: 32
The reason i ask is i have a g21 / 10mm storm Lake barrel & i couldn't find a g21 / 40 s&w conv. barrel. I don't think they make one, at least Storm Lake dosen't.
__________________
Ride hard, Shoot Straight & Speak the Truth = Jeff Cooper :supergrin:
Grizzz is offline   Reply With Quote
Old 01-28-2013, 20:07   #72
vaquero aleman
US ARMY 63D20H8
 
vaquero aleman's Avatar
 
Join Date: Jan 2009
Location: On the other side of the tracks
Posts: 686
Quote:
Originally Posted by Grizzz View Post
The reason i ask is i have a g21 / 10mm storm Lake barrel & i couldn't find a g21 / 40 s&w conv. barrel. I don't think they make one, at least Storm Lake dosen't.
I have to agree, I don't think that a 45 to 40 conversion exists but I will be buying the LWD 10 to 40 conversion when they finally get it in stock. $109 plus shipping is a whole lot cheaper than another gun.

And, I finally got some Underwood 180gr TMJ 10mm and that is what I am now carrying in my 21. I have some questions to be answered about my slide before I continue shooting .460 Rowland. I should be getting about 1425 to 1450 fps from my 6" barrel. Pretty hot!
__________________
G2930SF(.460 Rowland), The 21 Club #7663, The 10 Ring #7663.

http://www.glocktalk.com/forums/show....php?t=1474601
___________________________________________
Amateur Glock Modification Expert...

Last edited by vaquero aleman; 01-28-2013 at 20:14..
vaquero aleman is offline   Reply With Quote
Old 01-28-2013, 20:27   #73
ScottieG59
Senior Member
 
ScottieG59's Avatar
 
Join Date: Jan 2011
Location: Rural area near Kansas City, KS
Posts: 967
Quote:
Originally Posted by vaquero aleman View Post
I have to agree, I don't think that a 45 to 40 conversion exists but I will be buying the LWD 10 to 40 conversion when they finally get it in stock. $109 plus shipping is a whole lot cheaper than another gun.

And, I finally got some Underwood 180gr TMJ 10mm and that is what I am now carrying in my 21. I have some questions to be answered about my slide before I continue shooting .460 Rowland. I should be getting about 1425 to 1450 fps from my 6" barrel. Pretty hot!
Well, you will need some magazines. The 40S&W, 357 SIG and 9x25 Dillon will feed in a Glock 20 10mm magazine. I would not trust the 21 magazine to be reliable with those calibers.

I also wonder how reliable the extractor would be. The 10mm Glock 20 conversions I see all have the same base diameter. It may work fine like my Glock 27 40S&W-9mm conversion, in which I change the barrel and use 9mm magazines.
ScottieG59 is offline   Reply With Quote
Old 01-28-2013, 20:37   #74
vaquero aleman
US ARMY 63D20H8
 
vaquero aleman's Avatar
 
Join Date: Jan 2009
Location: On the other side of the tracks
Posts: 686
I got two G20 mags when I bought the 6" barrel. And after I shot the 40 I found that I had to do the "KKM" conversion on my extractor. I shot some 10mm after that and everything was ok, but I haven't had a chance to run any more 40 through it. Also, it's not as positive an ejection as the 45 but the 40 does eject when I cycle some by hand.

But, to get back to the OP's point, I did pick up a value box of Rem 40 S&W JHP that I intend to run through my factory G20 6" barrel. I want to see if the mod to the G21 extractor will fix the ejection problem with the 40 caliber rounds. And I need to see if maybe their might be a problem with the Underwood 135gr primers being a little too hard.
__________________
G2930SF(.460 Rowland), The 21 Club #7663, The 10 Ring #7663.

http://www.glocktalk.com/forums/show....php?t=1474601
___________________________________________
Amateur Glock Modification Expert...

Last edited by vaquero aleman; 01-28-2013 at 20:47..
vaquero aleman is offline   Reply With Quote
Old 01-29-2013, 07:50   #75
Billy10mm
Senior Member
 
Join Date: Jun 2008
Location: Hartsdale, NY
Posts: 1,171
Quote:
Originally Posted by Yondering View Post
It is not a good idea. Just like a 1911 and most other 10mm pistols, the firing pin is long enough to set off the round, even if it is in front of the extractor. This causes the case to slam back against the breech face, and sometimes results in case bulges and possibly ruptures. You'll also notice a spot where the case rim gets sheared off, as it's forced past the extractor (towards the rear) at high speed.

The Glock is the only gun I know of where this is a safe practice.

I will admit to doing this with my Witness back when I had one, to find out what it would do, and have never seen or heard of damage to a gun or shooter from it, but just judging from the appearance of the brass, I wouldn't do it any more.

In the Witness, when (not if) a round jumps the extractor, you'll see fired brass like this:
The 10 Ring
For the record, I shoot .40 out of my 10mm 1911 frequently.
__________________
Billy
Glock 23
Fusion Tact-5 in 10mm
H&K P30S 9mm
Ruger SR22
Billy10mm 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 08:51.



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


Users Currently Online: 1,127
379 Members
748 Guests

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