Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Rifles, Bullets, Barrels & Ballistics

Rifles, Bullets, Barrels & Ballistics Applied Ballistics


Reply

Gun Discharges While Chambering Round

 
LinkBack Thread Tools Display Modes
  #1  
Old 03-26-2005, 06:56 PM
Junior Member
 
Join Date: Mar 2005
Posts: 7
Gun Discharges While Chambering Round

New Rifle, Target shooting, round number 21, when chambering discharges. The good: I wasn't pointing at anyone. The bad: I was in my house shooting out of the sliding glass door. The door survived but you wouldn't believe what a muzzle blast can do to a ceiling! Of course the bullet didn't stop there, after entering the attic it exited the front of the house just below the peak then blasted into the overhang and through my brand new metal roof! As hard as I tried to recreate (without bullet in chamber) the discharge, by shoving bolt forward, the gun seems sound. I'm wondering how to approach the manufacture on this. I should add the first thing I did upon purchasing was to lighten the trigger (model 70). Easy adjustment, still stiffer than stock Browning A-Bolt trigger. I would guess about 4lbs. Any suggestions?

Mr Ranger
Reply With Quote
  #2  
Old 03-26-2005, 07:28 PM
Silver Member
 
Join Date: Sep 2004
Location: Southwestern Montana
Posts: 294
Re: Gun Discharges While Chambering Round

You could post this in the long range oooops. [img]/ubbthreads/images/graemlins/blush.gif[/img] Thankfully no one hurt. That will teach you for shooting guns in the house. My mother always said no shooting in the house. [img]/ubbthreads/images/graemlins/grin.gif[/img] If you mention to the manuf you tweaked the trigger they would probably tell you to get lost. I'm not sure you can do anything except suck it up and patch some holes. [img]/ubbthreads/images/graemlins/frown.gif[/img]
__________________
If you're gonna be dumb you better be tough.
Reply With Quote
  #3  
Old 03-26-2005, 07:40 PM
 
Posts: n/a
Re: Gun Discharges While Chambering Round

I had the same thing happen to me.I had lightened the trigger a few days before I went hunting and forgot to tighten the lock nut on the sear back down tight.During my practice shooting,the lock nut worked loose.i had to leave the woods and tighten it back down.Its ok now but it sure was scary.You may need to have a gunsmith slick the trigger up to get to the desireds pull wt and still have the trigger function properly. Good luck and be careful.
Reply With Quote
  #4  
Old 03-26-2005, 08:40 PM
Junior Member
 
Join Date: Dec 2004
Location: Central PA
Posts: 15
Re: Gun Discharges While Chambering Round

After adjusting any trigger I always hit the action with a dead blow hammer several times, While the saftey is off and the gun is not loaded of course. You should be able to get a Winchester trigger to 1 1/2 Lbs safley. I also have had a metal sliver come off of the trigger and It would discharge when you took the safety off. Make sure the are no pieces of metal when you dissasemble the mechanism or you will need to replace the trigger or go to a gunsmith.
Reply With Quote
  #5  
Old 03-26-2005, 11:19 PM
Official LRH Sponsor
 
Join Date: Jun 2004
Location: Fort Shaw, Montana
Posts: 6,822
Re: Gun Discharges While Chambering Round

Mr Ranger,

Do not do anything with this rifle until you take it to a smith and let them check that sear angle out.

A trigger sear angle should be neutral at worst and preferable a bit positive in angle. That this means is that the angle of the engagement will actually force the two seperate parts harder into engagement instead of away from each other.

To check this it is relatively easy. Tighten up your trigger pull weight spring until you have a trigger that will not slip off with a few heavy blows with a hard rubber mallet.

Make sure the rifle is unloaded and I would not recommend doing rifle work in doors!!!

Test the trigger pull weight with a quality trigger pull guage. Note the poundage needed to trip the trigger.

Now recock the bolt and rap on the receiver 10 good blows with the mallet. Youdo not have to beat the hell out of the receiver but give it some good wacks.

If the sear angle is negative(very unsafe), the trigger will either slip off during these 10 blows or the trigger pull will decrease after these impacts because the trigger/sear engagement will slip and become less.

So if you get a trigger pull of 4.0 lbs and then a pull of 3.5 lbs after you have impacted the receiver 10 times you have a negative sear engagement angle, very unsafe and not acceptible.

If the sear angle is neutral then the standard pull weight and the pull weight after the impacts will be identical. This is marginal on the safety side and I personally do not accept neutral engagement angles.

If it is positive, you will actually have the trigger pull increase from a standard pull to the pull after the impacts. This is because the positive angle is actually driving the sear contact deeper with each impact, this is very good and as safe as possible.

You can do this simple test at home if you have a quality trigger pull guage and a non marking mallet.

I have taken the Win 70 trigger down to 8 oz several times with total safety. Not all will accept this but a properly cut M70 trigger can be tuned down to very light pulls.

If your trigger is negative, I would look into an aftermarket trigger as the Win 70 sear notch is very small and can be difficult to true up.

Good Shooting!!

Kirby Allen(50)
__________________
Kirby Allen(50)

Allen Precision Shooting
Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.

Farther, Faster and Flatter then ever before.

Web Page: www.apsrifles.com

allenmagnum@gmail.com
Reply With Quote
  #6  
Old 03-27-2005, 02:47 PM
Junior Member
 
Join Date: Mar 2005
Posts: 7
Re: Gun Discharges While Chambering Round

Fiftydriver, I believe I will look for a smith that totally understands the things you have mentioned. I certainly, with my inexperience wouldn't trust myself with the aforementioned procedures. It's a scary thing to have the weapon discharge when your not expecting it! Thanks for the advice.

Mr Ranger
Reply With Quote
  #7  
Old 03-27-2005, 09:49 PM
Silver Member
 
Join Date: Dec 2004
Location: BINGHAMTON, NY
Posts: 166
Re: Gun Discharges While Chambering Round

[ QUOTE ]

**I should add the first thing I did upon purchasing was to lighten the trigger
**with my inexperience wouldn't trust myself with the aforementioned procedures

[/ QUOTE ]

goes to show how quickly one can get themselves into trouble by playing with things that they should leave to those with knowledge.
Very expensive learning experiance. Hope others might learn from your mistake as well.

Good Luck,
Ben
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: Gun Discharges While Chambering Round
Thread Thread Starter Forum Replies Last Post
round not chambering renegadelzard Reloading 7 10-18-2010 10:08 PM
B-78 chambering help elkaholic Gunsmithing 6 11-06-2009 09:22 PM
Re chambering DONTSTROKEME Rifles, Bullets, Barrels & Ballistics 2 01-05-2007 11:06 AM
7mm RM chambering help 11B2CV Reloading 9 12-12-2006 10:10 PM
Which chambering? philip h The Basics, Starting Out 1 03-20-2005 10:11 PM


All times are GMT -5. The time now is 10:19 PM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC