1911Forum
Forum   Reviews   Rules   Legal   Site Supporters & Donations   Advertise


Go Back   1911Forum > Hardware & Accessories > Gunsmithing & Troubleshooting


Reply
 
Thread Tools Display Modes
  #1  
Old 06-18-2012, 10:00 AM
Imbel45 Imbel45 is offline
Member
 
Join Date: Mar 2010
Posts: 276
Set-back bullet.. how safe to fire it?




Hello there,

I have a couple of bullets that over the years of putting them back in the magazine and rack the slide, got their bullets set-back about 3mm in the case. When you compare those bullets against a brand new one, you can clearly see the difference in length
My question is....how safe is to fire those bullets? I have never attempted to do so, but was just wondering...........
__________________
Imbel45
Reply With Quote
  #2  
Old 06-18-2012, 10:21 AM
DirtyRod DirtyRod is offline
Senior Member
 
Join Date: Oct 2008
Location: Arizona
Age: 49
Posts: 3,209
Don't fire them. Those three are not worth the risk to you or your gun.
__________________
Dirty Rod
Reply With Quote
  #3  
Old 06-18-2012, 10:24 AM
Al Booth Al Booth is offline
Member
 
Join Date: Jan 2001
Location: Catonsville, Maryland, USA
Posts: 791
+1.
Don't do it - you have great potential for an over-pressure round.
Reply With Quote
  #4  
Old 06-18-2012, 10:26 AM
Jim Watson Jim Watson is offline
Senior Member
 
Join Date: Jun 2001
Location: Florence, Alabama, USA
Posts: 13,692
3mm = .118", nearly 1/8"
Way too much to shoot.
Reply With Quote
  #5  
Old 06-18-2012, 10:26 AM
Imbel45 Imbel45 is offline
Member
 
Join Date: Mar 2010
Posts: 276
Thank you both, you have answered what I have been suspecting.....overpressure!!....
__________________
Imbel45
Reply With Quote
  #6  
Old 06-18-2012, 10:29 AM
bikefreakjon bikefreakjon is offline
Member
 
Join Date: Oct 2009
Location: Idaho
Age: 39
Posts: 863
Don't , really don't if they were +P to begin with.

Sounds like you need to shoot off your carry/defensive ammo more often.

If you have a bullet puller you could re-use the primed case and bullet.

3mm is about .075 of an inch. If I had a load that was hot (like a self defense load) and it started at 1.250" , .075" of setback would make it 1.175" That is shorter than ANY .45 ACP over all length by the books.
Pressure WILL be way to high. Pull em.



Jon
__________________
"Practice till the hot brass burns the cheeks of your ass!" F Bob Chow.
Reply With Quote
  #7  
Old 06-18-2012, 10:32 AM
bikefreakjon bikefreakjon is offline
Member
 
Join Date: Oct 2009
Location: Idaho
Age: 39
Posts: 863
I thought I was going to be the "first responder". Need to type faster, need more coffee.


Jon
__________________
"Practice till the hot brass burns the cheeks of your ass!" F Bob Chow.
Reply With Quote
  #8  
Old 06-18-2012, 10:37 AM
MTSCMike MTSCMike is offline
Member
 
Join Date: Mar 2011
Location: Tennessee
Posts: 526
If this is your carry ammo, rotate it more often.

When I load/unload my carry gun I always rotate the chambered round back into the box in a marked spot and chamber a fresh round the next time I load. I keep at least 2 or 3 boxes of carry ammo at all times. When I have rotated a whole box I check to see if any have experienced a set-back that is more than just a small amount. Those get discarded and the rest go to the range the next time I go to be fired and replaced with a fresh box.

Some ammo remains pristine unless rechambered several times so they may get rotated 2 or 3 times before they get fired.

I don't load/unlod my carry gun all that often so a few boxes last me about a year. This also guarantees that your carry ammo is always fairly fresh.

For my range and competition ammo, I always use the round that came out of the gun during unload/show clear as the top round in the next magazine so it is the first shot fired on the next stage. That way I never have a round that has been chambered more than twice.
__________________
IDPA Member A00640
Founding Charter Member - Middle Tennessee Shooter's Club
Currently shooting a custom STI 9mm...
Reply With Quote
  #9  
Old 06-18-2012, 10:47 AM
Jim Watson Jim Watson is offline
Senior Member
 
Join Date: Jun 2001
Location: Florence, Alabama, USA
Posts: 13,692
I just don't cycle ammunition in and out of the gun very much.
When it's loaded, it's loaded.
It only gets unloaded to clean out the dust bunnies, or to practice with cheaper ammo.
At which time I treat it like Mike, set the one out of the chamber aside and inspect it, reload with fresh.
Reply With Quote
  #10  
Old 06-18-2012, 11:31 AM
Imbel45 Imbel45 is offline
Member
 
Join Date: Mar 2010
Posts: 276
Thank you all for your answers........indeed I need to rotate more often my carry ammo. I use to be more methodical on it some years ago...but you are all right, I normally shoot my carry ammo every 3 months.

Lately, my wife's godson & goddaughter have been visiting us a lot more often than before forcing me to unload all my guns given that those kids a very curious about their Uncle -in law firearms ( yes I have a safe and I only lock it night). My 1911 is always at easy access hence the loading and unloading (at least twice a month)...........But hey!!! I will defuse the bullets and use the cases...
__________________
Imbel45
Reply With Quote
  #11  
Old 06-18-2012, 01:20 PM
shovelstrokeed shovelstrokeed is offline
Member
 
Join Date: Aug 2011
Posts: 1,097
I have about 8 rounds like that off in a special box waiting on my bullet puller.
I had a problem with my Commander sized guns when using 8 round mags and loading them into the gun with the slide closed. Nose dive of bullet #1 into the feed ramp. I slingshot my slide so the poor thing would get the full benefit of a healthy recoil spring and bury the bullet. I have one set back nearly to the ogive as a result.

Needles to say, no shootee short rounds.
Reply With Quote
  #12  
Old 06-18-2012, 08:06 PM
meanc meanc is offline
Member
 
Join Date: Jan 2010
Posts: 382
Had a feeding issue with a few older mags that caused the bullet to nose dive into the ramp. Had maybe 30-40 bullets that were set back over the course of a few months.

I just set them aside then put them all in my bullet puller. Tapped lightly till they were seated a tad further out than factory, then ran them through my seating die to the proper length with a light taper.

They all fired perfectly and the velocity and SD was just as the factory rounds.

So, if you have a bullet puller and reloading setup, there isn't any reason for you to have to pull the bullet completely.
Reply With Quote
  #13  
Old 06-19-2012, 10:56 AM
Imbel45 Imbel45 is offline
Member
 
Join Date: Mar 2010
Posts: 276
Quote:
Originally Posted by meanc View Post
Had a feeding issue with a few older mags that caused the bullet to nose dive into the ramp. Had maybe 30-40 bullets that were set back over the course of a few months.

I just set them aside then put them all in my bullet puller. Tapped lightly till they were seated a tad further out than factory, then ran them through my seating die to the proper length with a light taper.

They all fired perfectly and the velocity and SD was just as the factory rounds.

So, if you have a bullet puller and reloading setup, there isn't any reason for you to have to pull the bullet completely.
That will be a solution, unfortunately I do not have reolading equipment so getting them back to spec is beyond my reach......nevertheless, a bullet puller I have access to so I can re-use the casings for the guiy who does the reloading in my area........keep in mind in my country you need a special license to do so...........
__________________
Imbel45
Reply With Quote
  #14  
Old 06-19-2012, 01:51 PM
HungrySeagull HungrySeagull is offline
Senior Member
 
Join Date: Dec 2010
Posts: 2,176
Quote:
Originally Posted by bikefreakjon View Post
I thought I was going to be the "first responder". Need to type faster, need more coffee.


Jon
Less sleeping while waiting eh?

Don't shoot the damn things!!!! Pull em.
__________________
Colt XSE Gov't Tritium sights and various Wilson Combat parts.
Platinum Plus Member USCCA
Old Dogs can learn new things.
Reply With Quote
  #15  
Old 06-19-2012, 02:48 PM
subscriber subscriber is online now
Member
 
Join Date: Jan 2004
Location: California
Posts: 1,777
Quote:
Originally Posted by bikefreakjon View Post
3mm is about .075 of an inch.
Closer to 0.12".....
Reply With Quote
  #16  
Old 06-19-2012, 03:11 PM
Imbel45 Imbel45 is offline
Member
 
Join Date: Mar 2010
Posts: 276
Quote:
Originally Posted by subscriber View Post
Closer to 0.12".....
We use the metrical system millimeters, meters, kilometers.......Thata is why I was not sure about the meassure in inches...
__________________
Imbel45
Reply With Quote
  #17  
Old 06-21-2012, 02:02 PM
submoax submoax is offline
Junior Member
 
Join Date: Sep 2010
Location: North Idaho
Posts: 36
Having worked for two different major ammo manufacturer's in my life, testing has shown there are other factors to consider when "cycling" the same round over and over again. Testing showed that repeated shock and impact that a round gets when chambered can break down the primer pellet and cause it to fracture. This can cause voids between the primer cup and anvil, causing a failure to fire. Something to consider.
Reply With Quote
  #18  
Old 06-21-2012, 04:17 PM
Imbel45 Imbel45 is offline
Member
 
Join Date: Mar 2010
Posts: 276
Quote:
Originally Posted by submoax View Post
Having worked for two different major ammo manufacturer's in my life, testing has shown there are other factors to consider when "cycling" the same round over and over again. Testing showed that repeated shock and impact that a round gets when chambered can break down the primer pellet and cause it to fracture. This can cause voids between the primer cup and anvil, causing a failure to fire. Something to consider.
What about primer leakage? What causes it? how to avoit it? is it also part of a bullet thata has been chambered several times and also sufferes from bullet set back?

Is there a solution at the manufactuirng level to avoid bullet set-backs?
__________________
Imbel45
Reply With Quote
  #19  
Old 06-21-2012, 04:57 PM
michaelgee michaelgee is offline
Member
 
Join Date: Apr 2010
Location: Statesboro,GA
Posts: 1,006
dump your set back ammo

Just dump your questionable ammo, ALWAYS!
Ammo has no value to me when they are set back.
__________________
http://www.sgmgrips.com
-=- COTEP CBOB0611 -=-
GeorgiaCarry.Org Life Member
Reply With Quote
  #20  
Old 06-21-2012, 05:00 PM
M4finny M4finny is offline
Senior Member
 
Join Date: Mar 2010
Posts: 6,010
Quote:
Originally Posted by michaelgee View Post
Just dump your questionable ammo, ALWAYS!
Ammo has no value to me when they are set back.
Send it to me. I'll use the bullet puller and make it all better (for me) . Bullet setback if it is witnessed and monitored by the owner is not "questionable" IMO. The OP needs to invest in a bullet puller and fire away.

YMMV,

Fin
Reply With Quote
  #21  
Old 06-21-2012, 05:07 PM
Imbel45 Imbel45 is offline
Member
 
Join Date: Mar 2010
Posts: 276
Quote:
Originally Posted by M4finny View Post
Send it to me. I'll use the bullet puller and make it all better (for me) . Bullet setback if it is witnessed and monitored by the owner is not "questionable" IMO. The OP needs to invest in a bullet puller and fire away.

YMMV,

Fin
I already have!
__________________
Imbel45
Reply With Quote
  #22  
Old 06-21-2012, 09:57 PM
Mushinto Mushinto is offline
Member
 
Join Date: Mar 2001
Location: Melbourne, Florida
Posts: 1,702
Get rid of any colapso ammo stat.

Google "Los Alamos Glock Kaboom" for one glaring example.

ML
Reply With Quote
Reply

Bookmarks

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 -5. The time now is 05:24 AM.


NOTICE TO USERS OF THIS SITE: By continuing to use this site, you certify that you have read and agree to abide by the Legal Terms of Use. All information, data, text or other materials ("Content") posted to this site by any users are the sole responsibility of those users. 1911Forum does not guarantee the accuracy, integrity, or quality of such Content.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 2011 1911Forum.com, LLC. All Rights Reserved