Rem mohawk 600 extraction issue

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Hey
My brother in law has a mohawk. 308 ,that's failing to extract cases,90% of the time.

Seems the extractor is good,as you can't pull the case from it by hand.
Thinking it might be set back,headspace issues??

The bolt closes easily, with a 3 thousands shim.

Any idea of cost ,to get this fixed?

Maybe cut the barrel and team it back out?

It has fixed sights,so it would have to be timed.
I fired a primed case and the primer also backed out.

Or is he better off to scrap it?
 
A bit of excess headspace is not going to cause a 90% failure to extract rate.
What do the cases look like? Any sign of roughness or pitting in the chamber?
 
Not sure about pitting in the chamber

We tryed 10 pcs of rem resized brass and it exracked 2
The other 8 just fell off.

We then fired a pc primed brass and the primer was backed out.
We then removed primer from same case, put a 3 thousandths shim on the same pc of brass and it chambered easily.

Also,when you remove the bolt and lock a pc of brass in,its Impossible to pull it straight out.

The cases look good.
They were probably loaded 2 or 3 times.
 
I doubt it is a headspace issue but if he hand loads for this rifle he is creating excess case head clearance when he sizes. (The bolt closes easily, with a 3 thousands shim.)

What does the initial extraction camming area look like on the bolt and the action. Quality pictures are required.
 
OK, when a case is placed in the bolt face, hooked under the extractor, it can't be pulled straight out. That indicates that the extractor is in good shape.
But 90% of cases are not extracted from the chamber, and are left behind when the bolt is opened?
Sounds like a really rough chamber.

The only way to accurately check headspace is with gauges.
The bolt should close on a GO gauge without any contact being felt.
Ideally, it won't close on a NO GO, or might close, but with the gauge being felt.
It is not unusual for bolts to close on a NO GO gauge when a rifle has been in use for a while.
The bolt should not close on a FIELD gauge.
The ejector should be removed before gauging, and a light touch used.

A primer fired in an empty case will almost invariably back out a bit. A cartridge case isn't a gauge, so this doesn't tell you anything other than the relationship between that cartridge case and the rifle.
 
Thanks for the info.
I'm waiting on pics now.
He really likes this rifle for hunting, but dont want to spend more than its worth, to fix it.

His intentions are for me ,to find someone on here to fix it,depending on price.

Are either of you guys interested?

I'll have to ship it from NL.
 
So, I took a piece of Rem once fired brass,from a different gun.
I tryed it a total of 10 times.
5, it would eject
5 it wouldn't eject.
When I pull the bolt back slowly, you can see the brass fall off .
Maybe an ejector problem?
Picture shows where the brass ,falls off the bolt.View attachment 448034View attachment 448036
 
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Is the problem extracting or ejecting?

If the cases are being consistently being pulled out of the chamber, extraction is OK.
If the cases aren't being flipped out of the ejection port, ejection is the issue.

Check and see if the ejector - the plunger is moving freely, and is springy. Might be necessary to remove it and do some cleaning.

Positive extraction and ejection requires a bit of teamwork between the extractor and ejector. The extractor has to pull the case out of the chamber, and provide a pivot point for the ejector to flip the case out of the rifle.
As the bolt opens, and the extractor is pulling the case from the chamber, the ejector should be trying to tip the case to the right. Once the mouth of the case clears the receiver ring, it should be flipped out. The extractor has to control the position of the case, and the ejector has to be snappy enough to expel it from the rifle.
 
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The case is extracting to the point in the picture.
It has Pressure on it ,tilting the case to the right.
I guess its not extracting or ejecting,all the time

But when it gets to the position in the picture, it just falls off. If you look at the first picture, you can see that's where the case falls off.
I used the same case multiple times, and sometimes it flicks out and sometimes it just drops off.
 
OP,
Your headspace is fine...unless someone along the way Bubba'd the 600 Mohawk.
Clean the chamber & bore.
Wire brush & Qtip clean the bolt's breech face
Remove & clean the ejector/spring & ejector bore-reassemble.
Ejector tension can be modified by grinding the ejector spring a coil shorter.

F/L Size a piece of brass w/ slight bolt handle resistance.

Primers backing out of the pocket 9 times out of 10 is the result of oversized brass.
 
If you pull a Rem bolt slowly the shell will fall off, you have to pull bolt with some authority not limp wristed
 
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