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I took my carbine out to do some shooting this weekend for the first time in a few years and the bolt broke. The rifle was shooting fine for about 40 rnds of slow fire before the bolt failure. The bolt broke at the base of the lobe that connects to the op rod. This is the second time this has happened with this rifle. The bolt is USGI. The ammo I am shooting is wolf steel case that I bought from the CMP. I am not sure what's going on, any advice would be great? Thanks.
Early production flat bolts were known to break at that area. I would suggest getting
a round bolt. The bugs were worked out by then.
This was a round bolt that broke. I am not sure really what direction to take on this.
I hope you checked head space after replacing the bolt the first time. Also check the slide and receiver for worn spots
or grooves that would prevent the bolt from moving smoothly. If the bolt is not fully closed, the rifle might fire but
only a portion of the lug is against the receiver and that would put too much pressure on the lug.
Once you install the new bolt, checked head space, everything lubed, and after you load the first
round, make sure the bolt is fully closed and the slide all the way forward touching the piston. I
would do that for every shot for a while.
Maybe you just got unlucky and got a bad replacement bolt.
i didn't replace the bolt the first time, the cmp did. I assumed they checked the head space.
I wouldn't assume that cmp would check head space but since you sent the rifle back to them, they should have checked it.Quote:
Originally Posted by Colter44
The last service grade garand I mail ordered from cmp had a rusty trigger assembly, a bolt that didn't head space,
and a firing pin was so rusty inside the bolt that I needed a screwdriver to pry out the firing pin.
Now now Jak, we all know that the CMP test fires every rifle before shipping.Quote:
Originally Posted by jak
Yep, you're right. We know that no shenanigans ever occur at cmpQuote:
Originally Posted by Punch The Clown
Okay, Yes, If you really want to believe that...Firing them is Possible, but i beleive that some fall thru the black hole and are shipped, anyway..Quote:
Originally Posted by Punch The Clown
certainly the first Time I have read about the carbine bolts breaking...I know, I have noticed a lot more round bolts in the rifles..Quote:
Originally Posted by jak
OG, next thing you're going to tell me is Santa Claus isn't real.Quote:
Originally Posted by Old Guard
Punch, definitely not true, Santa still eats the cookies and drinks his beer, and the missus has a BIG smile on her face when she awakes???Quote:
Originally Posted by Punch The Clown
IIRC a lot of carbine threads elsewhere warned of using Wolf ammo. Mostly for the case mouth peening the chamber in the barrel.
Hope you get it sorted out. 30cf
Replace the bolt with a USGI round bolt, confirm head space, and then check bolt lug engagement using a sharpie marker.
I have a Plainfield Carbine that did the same thing, can anyone tell me where to get that makers bolt or would a GI bolt work after head spacing.
A USGI bolt should work fine.Quote:
Originally Posted by Frogman
Lots of info here.
http://www.m1carbinesinc.com/carbine_plainfield.html
Except for Punch's Reach Around.Quote:
Originally Posted by jak
Jon