M305 barrel over-tightened

AlbinoMoose

AlbinoMoose

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I have an M305 with the Barrel overtightened. Under-tightened or under-indexed barrel's seem to be an easy fix however I have read that an over-tightened barrel is not as simple as just loosening it off.

Below is a quote from this article http://www.m14.ca/seminar/M14_Seminar_EBR.pdf

"The barrel may be incorrectly indexed to the receiver. If the front sight leans to the left, and the rear sight is adjusted to the right to compensate, then the barrel has been over-tightened. To correct this, the barrel must be removed, and the barrel shoulder must be rolled back to replace the metal distorted by this over-tightening. Since proper alignment, torque, and fit of the barrel shoulder to the receiver is critical to accuracy, is is not a trivial fix."

Does anyone have experience with over-indexed barrel's? Is there anyone in or around Calgary that has a barrel vice to do this kind of work?
I have already invested a lot of money into parts from M14.ca & all the accessories to upgrade it but I don't want to remove the flash hider etc. if it's going to cost me more than the rifle to re-index it.

Maybe I should just look for another M305 and use this one for spare parts. Not really sure what to do at this point, any thoughts or suggestions?
 
The remedy described is simple and straightforward, apart from the requirement to remove the barrel.
Headspace may be increased slightly.
 
Thanks yomomma for the moral support!

I guess I'm just looking for a little help and hoping that someone has a barrel vice around Calgary. I'm more than willing to learn!

"the barrel shoulder must be rolled back to replace the metal distorted by this over-tightening." - I don't even know what the barrel shoulder is, and is it necessary to do this?!?

yomomma said:
Don't get discouraged.

Its a relatively easy fix.
Click to expand...
 
Think of it in the same line as a crush washer. As the barrel is screwed in it crushes the shoulder to create tension. Once you remove the barrel you have to re-create this shoulder. I smith should be able to do the whole think in less then 20 minutes. ( a smith that knows the platform)
 
Sounds easy enough! I also need the barrel re-threaded for a muzzle break. Does anyone know of a smith near Calgary that is familiar with the platform?

I stopped by The Calgary Shooting Centre and was told they don't have the equipment to do it yet and The Shooting Edge smith did not give me the impression that he wanted to do it and if he did, it would cost me an arm and a leg (more than I paid for the rifle).


yomomma said:
Think of it in the same line as a crush washer. As the barrel is screwed in it crushes the shoulder to create tension. Once you remove the barrel you have to re-create this shoulder. I smith should be able to do the whole think in less then 20 minutes. ( a smith that knows the platform)
Click to expand...
 
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