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PTG one-piece bolt won't close

Apologies, I've been away for most of the weekend and didn't realize that my question would generate such a discussion.

In the end, I think it is a more mundane reason for the bolt not closing - the bolt body is slightly oversized, perhaps by 0.0015 and is binding when I am attempting to close it. The measurements (lug to handle) show that the bolt should fit. So now I think I need to polish down the diameter til it fits.


OK, good to know. I think a different issue than has been addressed.
 
OK, good to know. I think a different issue than has been addressed.

Yes, sorry. I am very appreciative of everyone's advice - as well as cautionary tales.

Does anyone, then, have a recommendation on how to polish down the bolt? Would silicon carbide or aluminum oxide sandpaper with a lot of elbow grease be sufficient?
 
How was the OEM barrel removed from the receiver?
Rear entry/port wrench?
Action twisted?
Oversized bolt raceway?

grind the bolt body diameter.

Indicate the bolt lugs to confirm they are centered w/ the bolt body.....also.
 
How was the OEM barrel removed from the receiver?
Rear entry/port wrench?
Action twisted?
Oversized bolt raceway?

grind the bolt body diameter.

Indicate the bolt lugs to confirm they are centered w/ the bolt body.....also.


No rear entry wrench was used. I believe the method was using a barrel vice and standard action wrench.

The raceways were not touched at all.

Do you have a recommended method of grinding the bolt body diameter?

How best would I go about indicating the bolt lugs? Would I simply put the indicating fluid on the lug surfaces that contact the receiver channel and see if they bind/there is transfer?
 
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Is the bolt body too tight in the barrel nose or the action? Will it go into the action with no barrel attached? Don't start gringing on your bolt body....--jerry
 
Is the bolt body too tight in the barrel nose or the action? Will it go into the action with no barrel attached? Don't start gringing on your bolt body....--jerry

It is in the action, not the barrel nose. There is no barrel attached. I can use layout fluid to clearly identify two spots where, near the handle of the bolt, two parts of the raceway are catching on the bolt.

So either the bolt is not perfectly cylindrical or the raceway isn't. In all likelihood it is the raceway. So that as the bolt closes, it is not closing perfectly square so that it binds because the diameter of the bolt, 0.700", is smaller than the major axis of the raceway but larger than the minor axis of the raceway.

Or, at least, that is my appraisal of the situation so far.
 
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OK. then I didn't understand the statement of the problem. I'll stand by to see if anyone has a simple solution to this problem. --Jerry
 
Just about every Remington action is warped, most of the time the tang is pointing down. I'd also look for burs that occur around the mag cuts and extraction cam.
 
Just about every Remington action is warped, most of the time the tang is pointing down. I'd also look for burs that occur around the mag cuts and extraction cam.


I can definitely feel a burr along that area as I run the bolt. Do you suggest polishing it out?
 
It's amazing sometimes what will bind a bolt, it takes very little of a bur or the bolt being very slightly tweaked and they lock, I've found my Wheeler Accuracy bar set invaluable to finding any little spots in the race ways that need a little attention when fitting a tight bolt.
 
good question. My fingers are the only part of my body that are getting fat with age.....

I was trying to address this question from above, "Do you have a recommended method of grinding the bolt body diameter?"

thanks,
Jerry
 
good question. My fingers are the only part of my body that are getting fat with age.....

I was trying to address this question from above, "Do you have a recommended method of grinding the bolt body diameter?"

thanks,
Jerry

Jerry, If I had a bolt body that was too large in OD I could grind the OD in my KO Lee T&C grinder. But!, having run into this in years past I spec my "hunting" rifles too have a .003" clearance between the bolt body and raceway bore. My comp. rifles are fitted however BAT, Kelblys, Pierce, or Stiller ships them.
 
Just about every Remington action is warped, most of the time the tang is pointing down. I'd also look for burs that occur around the mag cuts and extraction cam.

Sure enough Alex, you were right. The tang is slighly pointing down and so it is causing a mild constriction in the raceway at the point where it bends. A few minutes of gentle polishing and checking and now the bolt does close smoothly.

Thanks again for everyone's advice. I guess this suggests I probably should have started with a custom action to begin with...
 

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