So this just happened-- Game over man >.<

Here is my take for whats it worth. I have a Norinco M305 have about 1800 rounds through it. With the modifications that I have made to this rifle I am now only able to get 1-3 inch groups and that is with carefully loaded ammunition. I have spent well over $1000 to get my battle rifle to do this. If you have a Stock Norinco that shoots 1-1.5 moa get yurself a new bolt and consider yourself lucky. You got a good shooter for sure, couple hundered bucks for a bolt ante no big deal.
 
eaglesnester said:
Here is my take for whats it worth. I have a Norinco M305 have about 1800 rounds through it. With the modifications that I have made to this rifle I am now only able to get 1-3 inch groups and that is with carefully loaded ammunition. I have spent well over $1000 to get my battle rifle to do this. If you have a Stock Norinco that shoots 1-1.5 moa get yurself a new bolt and consider yourself lucky. You got a good shooter for sure, couple hundered bucks for a bolt ante no big deal.
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Ya despite all the trouble i've had with it, blown Bolt, faulty trigger, mis-aligned gas cylinder it does shoot amazingly well.
And yes I know how crazy it sounds saying 1- 1.5 moa for a M305. Just got crazy lucky I guess.
That's also shot from a weighed down lead sled.

Bolt has been replaced with a HRT, also fine tuning the black feather chassis barrel tension yielded a bunch improved accuracy.
 
Merovingian said:
Norinco M305 bolt failure :(

Hello fellow nuts. I went up to the local range this morning sighting in a new scope on my Blackfeather Norinco M305. The rifle is a recent new build and has precisely 148 rounds of 308 win through it. I've only fed it Federal SMK 168's and have had zero issues up till now. The rifle has shot like a champ, 1 - 1.5 moa which i was pretty pleased with. Never had a FTF or FTE till today, had a FTE when the bolt cracked.

Any ideas on what would cause something like this?
Is pushing 168's too rough on the internals or did I just get an unlucky Chinese bolt? Factory loaded Federal SMK 168gr
I have inspected inside the receiver and everything looks pretty normal and it seems the bolt was the only thing damaged.
The casing of the last round fired before the failure looked really good and just like every other round fired before it. There was no unusual sound or feeling on the last round fired either.

I will be getting a hold of the awesome gunsmith :) that helped me build it but im still curious on the cause of something like this.

Anywho just wondering what some of your opinions might be on why the bolt failed like this.

Thanks again :)


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Sure looks like a casting.
 
If the OP still has the bolt, can we see good lighting pics of the bottom of the bolt? I'm betting this is another of those MIM bolts that have been appearing and seem to be failing at an alarming rate around the 150-250 round mark.
 
Claven2 said:
If the OP still has the bolt, can we see good lighting pics of the bottom of the bolt? I'm betting this is another of those MIM bolts that have been appearing and seem to be failing at an alarming rate around the 150-250 round mark.
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I was just thinking that.

OP, is there a year of manufacture stamped on the side of the receiver? Or can you tell us when you bought the rifle as new? From what I have read, mostly here on CGN, the newer bolts have this problem...and I would like to be sure that all 3 of my (older imported) norcs don't.
 
Looks like my TRW bolt. It did the same thing with norinco ammo.
That was about 20 years ago. Springfield m1a with all TRW parts.
They checked the gun and put another TRW bolt in it.
Guns still runs great
 
can14 said:
Looks like my TRW bolt. It did the same thing with norinco ammo.
That was about 20 years ago. Springfield m1a with all TRW parts.
They checked the gun and put another TRW bolt in it.
Guns still runs great
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Except the OP only shot one load through his rifle, the Factory loaded Federal SMK 168gr offering that is largely used in M1A/M14 rifles almost exclusively. It ought to have been fine, except the bolt was a MIM'ed piece of junk. MIM should not be used in high pressure high cyclic applications - that's like materials science 101.
 
ipscgraz said:
I was just thinking that.

OP, is there a year of manufacture stamped on the side of the receiver? Or can you tell us when you bought the rifle as new? From what I have read, mostly here on CGN, the newer bolts have this problem...and I would like to be sure that all 3 of my (older imported) norcs don't.
Click to expand...

2014 rifle, bought July 2017.

John has also just put a great post showing the failed bolts
https://www.canadiangunnutz.com/for...failures-in-recent-import-M-14-pattern-rifles
 
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