Pinned barrel tap hole

[ARCHIVED THREAD] - Pinned barrel tap hole

Posted: 1/19/2019 12:25:04 AM EDT

I was given a low round count 14.5” ar barrel that had been drilled to be pinned & welded. The drill hole was punched into the bore at the threads. Does the drill hole ruin the barrel accuracy? This is a dd chf barrel, so I’d hate to trash the barrel if I can help it

Posted: 1/19/2019 12:55:47 AM EDT

[#1]

If there's a burr protruding into the bore I'd gently file it away.
Throw a muzzle device on it and pew pew away

Posted: 1/19/2019 3:06:22 AM EDT

[#2]

I remember reading a similar thread where many said it would trash accuracy. A few people said they had no real impact to accuracy. At this point, there is no reason not to try it.

Posted: 1/19/2019 4:46:21 AM EDT

[#3]

Check to see if their is a burr, then shoot it to see how the accuracy is on it, sometimes they work fine, sometimes not so well, but you won't know until you throw some rounds through it.

Posted: 1/19/2019 6:17:14 PM EDT

[#4]

Thanks! I will give it a ....shot.

Posted: 1/20/2019 2:34:31 PM EDT

[#5]

I have dealt with a couple of similar situations, I was able to cut and recrown the barrel, turn the tenon back to .600 long and pick up the threads and thread it.
Pin and weld a longer device such as a SureFire.
There will be a gap in the threads but with the pinned device it is irrelevant.

Posted: 1/23/2019 7:24:23 PM EDT

[#6]

I looked into cut/recrown, but I can buy a brand new barrel for less than ADCO charges for this service.

Posted: 1/25/2019 10:19:55 AM EDT

[#7]

Well you could counter bore it if you had a lathe.
Run an end mill down the bore past the bad spot.
I did this to a cheap blaster barrel whoes bore was larger in the threaded area than the rest of the bore.
The crown is just recessed more than normal.
Also had a 1903 with a wallered out muzzle that got the same treatment.
Both barrles shoot fine now.

[ARCHIVED THREAD] - Pinned barrel tap hole

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