reboring to change barrel caliber
- TOM R
- Field Marshal
- Posts: 3355
- Joined: Wed Mar 09, 2005 3:11 pm
- Anti-spam: Mg42
- Location: ESCAPED FROM Nazi Jersey, !!!
reboring to change barrel caliber
can you take a 308 barrel and make it 8mm, by lengthening the chamber and enlarging the bore?
Great men are born in fire, it is the privilege of lessor men to light the flame, no matter the cost
FOR M60 GOTO http://WWW.M60MG.COM
nra lifer
mvpa 31698
46 cj2a
54 m37
56 CJ3B U.S. Navy
t24/m29 weasel
FOR M60 GOTO http://WWW.M60MG.COM
nra lifer
mvpa 31698
46 cj2a
54 m37
56 CJ3B U.S. Navy
t24/m29 weasel
The 7.62 case has less taper than the 8mm, so the brass would be stretched a bit at that point. I don't know if it would be enough to cause separations or not but it might.
How much would it cost to rebore a barrel like that? It might be just as easy to have a new barrel made and fitted to the extension.
How much would it cost to rebore a barrel like that? It might be just as easy to have a new barrel made and fitted to the extension.
-
- Oberfeldwebel
- Posts: 80
- Joined: Tue Jun 07, 2005 12:05 pm
Re: reboring to change barrel caliber
Sure you can do anything but let's take a look at the economics. Price of a 308 barrel 70.00. Rechamber-75.00-100.00, rebore and rifle 200.00 +. I think buying a 8mm barrel outright is cheaper even if you have to pay 200.00 for it.TOM R wrote:can you take a 308 barrel and make it 8mm, by lengthening the chamber and enlarging the bore?
One thing everyone has to keep in mind is the hardness of the MG barrel. It is measured on the Rockwell Scale (RC) An original GI MG barrel will measure RC 48-52. A new manufactured barrel blank is RC 26 +-. You're much better off with an original barrel.
I had a 1919A4 and bought a new RC 26 8mm barrel for it. I literally shot it out with less than 10,000 rounds. I've got an original 30.06 barrel that I have run 25,000 + rounds thru and it gages a 5 on throat erosion.
- TOM R
- Field Marshal
- Posts: 3355
- Joined: Wed Mar 09, 2005 3:11 pm
- Anti-spam: Mg42
- Location: ESCAPED FROM Nazi Jersey, !!!
just ryin to think of a use for shot out or rusted 308 barrels ![Very Happy :D](./images/smilies/icon_biggrin.gif)
![Very Happy :D](./images/smilies/icon_biggrin.gif)
Great men are born in fire, it is the privilege of lessor men to light the flame, no matter the cost
FOR M60 GOTO http://WWW.M60MG.COM
nra lifer
mvpa 31698
46 cj2a
54 m37
56 CJ3B U.S. Navy
t24/m29 weasel
FOR M60 GOTO http://WWW.M60MG.COM
nra lifer
mvpa 31698
46 cj2a
54 m37
56 CJ3B U.S. Navy
t24/m29 weasel
- TOM R
- Field Marshal
- Posts: 3355
- Joined: Wed Mar 09, 2005 3:11 pm
- Anti-spam: Mg42
- Location: ESCAPED FROM Nazi Jersey, !!!
thought I saw on the 1919 board 8mm barrels that were bored out 308 barrels
must have been imaginin things ![Sad :(](./images/smilies/icon_sad.gif)
![Confused :?](./images/smilies/icon_confused.gif)
![Sad :(](./images/smilies/icon_sad.gif)
Great men are born in fire, it is the privilege of lessor men to light the flame, no matter the cost
FOR M60 GOTO http://WWW.M60MG.COM
nra lifer
mvpa 31698
46 cj2a
54 m37
56 CJ3B U.S. Navy
t24/m29 weasel
FOR M60 GOTO http://WWW.M60MG.COM
nra lifer
mvpa 31698
46 cj2a
54 m37
56 CJ3B U.S. Navy
t24/m29 weasel
Hey Y'all,
It is easier to remove the extension and using a plentiful M1919 .308/30.06 Barrel as a blank to thread the breech, and to machine/profile the barrel in a lathe. Short chamber the barrel and then Re torque the barrel back into the extension and finish the re chambering.
I have bored and rifled barrels, not hard just time consuming. Much easier to re barrel.
Mike Spivey
Spiveys Lock and Load
It is easier to remove the extension and using a plentiful M1919 .308/30.06 Barrel as a blank to thread the breech, and to machine/profile the barrel in a lathe. Short chamber the barrel and then Re torque the barrel back into the extension and finish the re chambering.
I have bored and rifled barrels, not hard just time consuming. Much easier to re barrel.
Mike Spivey
Spiveys Lock and Load
Last edited by BM59_Fan on Sun Aug 21, 2005 8:51 pm, edited 1 time in total.
- TOM R
- Field Marshal
- Posts: 3355
- Joined: Wed Mar 09, 2005 3:11 pm
- Anti-spam: Mg42
- Location: ESCAPED FROM Nazi Jersey, !!!
fine guys i get the hint just tryin
so the 308 shell is larger but the 8mm bullet head is larger, think we need to make our own size with 308 shells and 8mm heads lol ![Very Happy :D](./images/smilies/icon_biggrin.gif)
![Rolling Eyes :roll:](./images/smilies/icon_rolleyes.gif)
![Very Happy :D](./images/smilies/icon_biggrin.gif)
Great men are born in fire, it is the privilege of lessor men to light the flame, no matter the cost
FOR M60 GOTO http://WWW.M60MG.COM
nra lifer
mvpa 31698
46 cj2a
54 m37
56 CJ3B U.S. Navy
t24/m29 weasel
FOR M60 GOTO http://WWW.M60MG.COM
nra lifer
mvpa 31698
46 cj2a
54 m37
56 CJ3B U.S. Navy
t24/m29 weasel
- gunslingerdoc
- Stabshauptmann
- Posts: 215
- Joined: Mon May 16, 2005 2:45 pm
- Location: middle, MS
Must 1919 8mm barrels were made by converting 8mm MG-34 barrels. At least that's what Ive been told by a few guys Ive asked that make them for the 1919. So next time you wonder where all those nice new/excellent chrome lined IZZY barrel you wanted for your 34 remember it may be in your 1919!
Actually the 34 barrels could(?) be a source for a 42 barrel. I was cleaning a few last might but Id have to look closer to see if you could do it...a chrone lined 'new' 8mm MG42 barrel would sure make for a great blaster - purists would frown but for blazing away it would be nice.
Actually the 34 barrels could(?) be a source for a 42 barrel. I was cleaning a few last might but Id have to look closer to see if you could do it...a chrone lined 'new' 8mm MG42 barrel would sure make for a great blaster - purists would frown but for blazing away it would be nice.
Smooth is Fast
- TOM R
- Field Marshal
- Posts: 3355
- Joined: Wed Mar 09, 2005 3:11 pm
- Anti-spam: Mg42
- Location: ESCAPED FROM Nazi Jersey, !!!
my 8mm 1919 barrel is new made(I think) and identical to the 06 nd 308 ones I got
Great men are born in fire, it is the privilege of lessor men to light the flame, no matter the cost
FOR M60 GOTO http://WWW.M60MG.COM
nra lifer
mvpa 31698
46 cj2a
54 m37
56 CJ3B U.S. Navy
t24/m29 weasel
FOR M60 GOTO http://WWW.M60MG.COM
nra lifer
mvpa 31698
46 cj2a
54 m37
56 CJ3B U.S. Navy
t24/m29 weasel