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Recontouring a heavy barrel to something lighter?

This is a discussion on Recontouring a heavy barrel to something lighter? within the Gunsmithing forums, part of the M14 M1A Forum category; I am coming into a rifle that has a heavy no name barrel and was wondering how feasible it would be to recontour it? I ...


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Old August 13th, 2013, 10:10 AM   #1
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Recontouring a heavy barrel to something lighter?

I am coming into a rifle that has a heavy no name barrel and was wondering how feasible it would be to recontour it? I have done this with a few AR barrels, however I fully understand that an M14 barrel is a bit more complex. I do have access to some good lathes and mills so it shouldn't be too difficult to perform the required work. Has anyone ever done this?

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Old August 13th, 2013, 11:42 AM   #2
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Be aware that re-contouring a barrel can lead to catastrophic barrel failure depending on how the barrel was rifled. Cut rifled barrels are fairly safe, but swagged, button rifled, and hammer forged barrels require stress relieving if altered. Even cut rifled barrels will benefit from cyro treating or stress relieving when re-contoured.

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Old August 14th, 2013, 09:01 AM   #3
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Get a new barrel and save yourself a headache

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Old August 14th, 2013, 09:59 AM   #4
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YES-NEW bbl.
Cry one time and do it 'rite'.
LG

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Old August 14th, 2013, 12:26 PM   #5
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I'll search out a good replacement barrel before I go nuts and try turning down the one installed to the receiver. Bust out the old pipe wrench and cheater bar.

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Old August 14th, 2013, 01:41 PM   #6
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Remember these time proven rules for precison M14 Gun Smiting.

1.] use the pipe wrench on the BARREL, not on the receiver. I truly have seen M14 barrels with pipe wrench marks. I have even seen M14 receivers with pipe wrench and/or Record 6" vise jaw impressed checkering in reverse stippling marks. I had one receiver where the vise was used on the receiver parallel to the bore. Great technique for tightening up the fit of some magazines. This M14 was sold to a discriminating buyer, and we called the "checkering" an extra cost custom feature designed to REALLY hold that fiberglass bedding compound.

2..] No cheater bar should be over 4' in length. If you happen to be working on a Chinese M14, ALWAYS remove that tiny, hidden, super hard barrel retaining set screw in the side of the receiver BEFORE removing the barrel. The 4' Cheater bar is enough to actually drag that SUPER HARD screw through the barrel threads ... which may help tightening up a soft barrel shoulder to receiver fit ... or maybe not?.

3.] While the 20 lb wood splitting mall is ideal for some jobs, peening the back of the barrel shoulder by hand requires a lighter touch. Use a light hammer here, about 8 oz is right, with many, many, many light taps, rotating the barrel by hand while you tap.

4.] Copper wire is much too soft to increase the "draw" when fiitting a too loose barrel shoulder.Use soft steel tie wire here for best re-tension.

5.] And then hard chrome plate the barreled receiver AND the bolt, to get the head space just perfect. Then call it a CUSTOM BUILD, and sell it for BIG BUCKS!!!
[;)
LAZ 1

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Old September 14th, 2013, 08:51 AM   #7
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Quote:
Originally Posted by Ted Brown View Post
Be aware that re-contouring a barrel can lead to catastrophic barrel failure depending on how the barrel was rifled. Cut rifled barrels are fairly safe, but swagged, button rifled, and hammer forged barrels require stress relieving if altered. Even cut rifled barrels will benefit from cyro treating or stress relieving when re-contoured.
So a Krieger barrel should be safe to recontour then....?

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Old September 14th, 2013, 09:52 AM   #8
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Quote:
Originally Posted by gwolf View Post
So a Krieger barrel should be safe to recontour then....?

Its fairly safe, why would you turn down a expensive cut rifled barrel? cheaper and safer in the long run too buy a barrel in the contour you need. Spend once, cry once.

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Old September 14th, 2013, 09:59 AM   #9
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Up here in canuck land it's an 8-10 month wait for a barrel unless I take a medium or heavy.

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Old September 14th, 2013, 10:07 AM   #10
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Up here in canuck land it's an 8-10 month wait for a barrel unless I take a medium or heavy.
Spend once, cry once. Its worth the wait and cheaper in the long run. If who ever is doing the work and if they mess it up your wait starts again is that worth the expense? and the aggravation?

my .02

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Old September 14th, 2013, 04:57 PM   #11
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Machining cost would be more than a new pipe
There is a nice selection of barrels available. Just make sure the person who fits it knows what he's doing.

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Old September 14th, 2013, 06:01 PM   #12
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Originally Posted by Ted Brown View Post
Be aware that re-contouring a barrel can lead to catastrophic barrel failure depending on how the barrel was rifled. Cut rifled barrels are fairly safe, but swagged, button rifled, and hammer forged barrels require stress relieving if altered. Even cut rifled barrels will benefit from cyro treating or stress relieving when re-contoured.
I couldn't agree with this more . It is a lot more trouble than it is worth to recontour an M14 barrel and will lead to no good . Sell the barrel and get the proper contour that you need

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