M1 Carbine broken extractor

Patrick Graham · January 31, 1999, 11:31 AM

Hi
My M1 Carbine is on it's 8th extractor.
They keep breaking.
Any suggestion?
Is this a common Carbine Problem?
Patrick Graham
[email protected]

Walt Welch · January 31, 1999, 10:57 PM

This is not a common problem. You have something wrong. Ammo that is too hot, forcing the extractor to try and extract the cartridge before chamber pressure has dropped enough is a possibility, as is a rough chamber, or a number of other problems.

Get to a gunsmith. Walt

Patrick Graham · February 2, 1999, 07:33 PM

Walt
I think you may have hit on it...
Interesting that the extractor never breaks
until I start shooting my reloads..
Never have a problem with factory ammo.
I'm using ww296 right now.
ALSO... I don't remember having this problem
when I first got the carbine.. I was
with AA#9 back then...
THANKS
Patrick Graham

Walt Welch · February 3, 1999, 07:10 PM

Patrick; been there, done that. I was working up reloads for my M1 Carbine, and after shooting the hottest of the loads, which were 0.1gr. different, and under the max published in one loading book, I pierced the primers on the next lot of 10 rds. I didn't discover this until I was through shooting.

Be careful, and watch pressure carefully. Also, I would not use mag primers, as the small case volume, IMHO, makes them superfluous. If you do use mag primers, start with low loads and work your way up. Very carefully. Hope this helps, Walt

Cheapo · February 4, 1999, 02:16 PM

Never used mag primers in .30 Carbine for either H110 or WW296 loads. Extreme velocity spreads are low and accuracy is good.

Is it a USGI Carbine? I had some reloads occasionally boost pressure so high, chamber machine marks would be clearly impressed on the case walls, the primer pockets expanded to never again hold a primer, and a nice impression of the ejector cutout showed up on the case head. Very dangerous pressures! But the extractor never broke.

After that one shooting session, examination of the variables showed that the cases were in serious need of trimming. The crimp used on those lead bullets was letting the case mouth slip ahead of the chamber and into the throat by about half a millimeter. That left the bullets rather firmly crammed into the cases with no easy way out.

No further problems since trimming all those $#%&!!! cases. Oh, tedium!

Cheapo.

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January 31, 1999, 11:31 AM	#1
Patrick Graham Junior member Join Date: January 18, 1999 Location: Kokomo, Indiana USA Posts: 674	Hi My M1 Carbine is on it's 8th extractor. They keep breaking. Any suggestion? Is this a common Carbine Problem? Patrick Graham [email protected]

January 31, 1999, 10:57 PM	#2
Walt Welch Senior Member Join Date: November 3, 1998 Location: Alamo, CA Posts: 424	This is not a common problem. You have something wrong. Ammo that is too hot, forcing the extractor to try and extract the cartridge before chamber pressure has dropped enough is a possibility, as is a rough chamber, or a number of other problems. Get to a gunsmith. Walt

February 2, 1999, 07:33 PM	#3
Patrick Graham Junior member Join Date: January 18, 1999 Location: Kokomo, Indiana USA Posts: 674	Walt I think you may have hit on it... Interesting that the extractor never breaks until I start shooting my reloads.. Never have a problem with factory ammo. I'm using ww296 right now. ALSO... I don't remember having this problem when I first got the carbine.. I was with AA#9 back then... THANKS Patrick Graham

February 3, 1999, 07:10 PM	#4
Walt Welch Senior Member Join Date: November 3, 1998 Location: Alamo, CA Posts: 424	Patrick; been there, done that. I was working up reloads for my M1 Carbine, and after shooting the hottest of the loads, which were 0.1gr. different, and under the max published in one loading book, I pierced the primers on the next lot of 10 rds. I didn't discover this until I was through shooting. Be careful, and watch pressure carefully. Also, I would not use mag primers, as the small case volume, IMHO, makes them superfluous. If you do use mag primers, start with low loads and work your way up. Very carefully. Hope this helps, Walt

February 4, 1999, 02:16 PM	#5
Cheapo Senior Member Join Date: November 19, 1998 Posts: 986	Never used mag primers in .30 Carbine for either H110 or WW296 loads. Extreme velocity spreads are low and accuracy is good. Is it a USGI Carbine? I had some reloads occasionally boost pressure so high, chamber machine marks would be clearly impressed on the case walls, the primer pockets expanded to never again hold a primer, and a nice impression of the ejector cutout showed up on the case head. Very dangerous pressures! But the extractor never broke. After that one shooting session, examination of the variables showed that the cases were in serious need of trimming. The crimp used on those lead bullets was letting the case mouth slip ahead of the chamber and into the throat by about half a millimeter. That left the bullets rather firmly crammed into the cases with no easy way out. No further problems since trimming all those $#%&!!! cases. Oh, tedium! Cheapo.