Screwed up my T81 rifling........how bad is it?

H

HawkWei

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Hi guys I screwed up big time when trying to remove the T81 barrel sleeve.

I was following online tutorial where you inserted a tape wrapped screw into the barrel and using gear puller to pull the sleeve out.
The whole process was very smooth until.....after the removel I inspect the barrel and I found some scratch damge.

The screw was not 100% straight under gear puller's pressure and part of my barrel was scratched as result.
I know, I was a damn fool and should have checked more often during the process!

The scratch can be felt by pick, and will caught a bit cotton using q-tip.

My question is:
1. How bad is the damage? Is it a critical safety concern or it is just might affect accuracy?
2. Can Gunsmith help to sand the scratch down?

Cheers!
ywjHoOZ.png
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Id be concerned about accuracy considering its the end of the rifling. That and the chrome lining may chip off now. Pretty good lesson not to do these bubba mods
 
Definitely not a safety concern, you'd have to obstruct significantly more of the bore for that to happen.

Sharp ridges won't be good for accuracy though, and they'll pick up chunks of jacket and cause a mess. I'd probably smooth it out the best I could (Go at it gently with a file on the rough spots, then some scotch brite or fine grit sandpaper maybe) and shoot it, see how it shoots. They were never laser beams at the best of times, so it might not even significantly affect accuracy.
 
Scotty454 said:
Definitely not a safety concern, you'd have to obstruct significantly more of the bore for that to happen.

Sharp ridges won't be good for accuracy though, and they'll pick up chunks of jacket and cause a mess. I'd probably smooth it out the best I could (Go at it gently with a file on the rough spots, then some scotch brite or fine grit sandpaper maybe) and shoot it, see how it shoots. They were never laser beams at the best of times, so it might not even significantly affect accuracy.
Click to expand...

Thanks, I was thinking the same, sand carefully to at least get the burr out
 
Scotty454 said:
Definitely not a safety concern, you'd have to obstruct significantly more of the bore for that to happen.

Sharp ridges won't be good for accuracy though, and they'll pick up chunks of jacket and cause a mess. I'd probably smooth it out the best I could (Go at it gently with a file on the rough spots, then some scotch brite or fine grit sandpaper maybe) and shoot it, see how it shoots. They were never laser beams at the best of times, so it might not even significantly affect accuracy.
Click to expand...
Before I would start using a file, sandpaper or some other coarse abrasive I would try going the 'fire lapping' route. Easy to do and any changes will be incremental so not much danger of going too far in one step. It should smooth out any serious burrs and sharp edges uniformly. Lots of info on fire lapping if you do a Google search. I've done it with decent results.

Barring success doing that I would agree with Tiriaq that recessed crowning/counterboring would be the next best bet.
 
Bring it to a gunsmith, not a big deal. It happens, at least you are admitting being a bad boy, lol.

Or you could take a big sized drill and finish your project. :cool:

What is the plan anyway.
 
First thing I’d do is shoot it as is and see if there’s any accuracy problems, if there are I’d try steel wool and some lapping compound first, chuck a section of cleaning rod in a drill and let the lapping compound do it’s work, go slow as it shouldn’t take much. Worst case a recessed crown or counter bored muzzle and you’ll be fine.
 
Butcherbill said:
First thing I’d do is shoot it as is and see if there’s any accuracy problems, if there are I’d try steel wool and some lapping compound first, chuck a section of cleaning rod in a drill and let the lapping compound do it’s work, go slow as it shouldn’t take much. Worst case a recessed crown or counter bored muzzle and you’ll be fine.
Click to expand...

Haha thanks for the advice!
 
1) you aren't a gunsmith. Taking it to a gunsmith would have averted your problem.
2) take it to a gunsmith before posting here about what you did next resulted in more regrets.
3) how did you not know putting a threaded screw into your bore under pressure was the dumbest thing ever?
 
If this was a match rifle, you would be screwed (no pun).
But I doubt that you will even notice any changes in accuracy (I'm using that term loosely), when it comes to the T81.

Just smoothen the burrs with a sandpaper or steel wool and call it a day.
 
Maybe a visit to a gunsmith would be a better idea than going to work on the bore with sandpaper, a file, etc.
Of course, it might be embarrassing to explain what happened to the bore...
 
HawkWei said:
Hi guys I screwed up big time when trying to remove the T81 barrel sleeve.

I was following online tutorial where you inserted a tape wrapped screw into the barrel and using gear puller to pull the sleeve out.
The whole process was very smooth until.....after the removel I inspect the barrel and I found some scratch damge.

The screw was not 100% straight under gear puller's pressure and part of my barrel was scratched as result.
I know, I was a damn fool and should have checked more often during the process!

The scratch can be felt by pick, and will caught a bit cotton using q-tip.

My question is:
1. How bad is the damage? Is it a critical safety concern or it is just might affect accuracy?
2. Can Gunsmith help to sand the scratch down?

Cheers!
ywjHoOZ.png
[/IMG]
Click to expand...

Have a gunsmith turn your barrel to a point below the damage then have it re- crowned. Likely about $150.00 or so to repair.
 
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