M1 Carbine broken extractor

P

Patrick Graham

Moderator
Hi
My M1 Carbine is on it's 8th extractor.
They keep breaking.
Any suggestion?
Is this a common Carbine Problem?
Patrick Graham
twotwothre@yahoo.com
 
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
 
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
 
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
 
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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