Site Notices
9/18/2014 11:03:27 AM
Author
Message
Toshu
Offline
Posts: 36
Feedback: 0% (0)
Posted: 8/3/2011 5:29:33 PM
Who makes the best 18in 7.62x51 barrel for the money???

I have a DPMS 308B with an 18in 308 chambered barrel and am considering switching to a 7.62x51 chambered barrel with a low profile upper. The reason for this thought is to be able to use surplus 7.62x51 ammo which DPMS frowns on in their 308 barrels.
Tim_W
Offline
Posts: 952
Feedback: 0% (0)
Link To This Post
Posted: 8/3/2011 6:48:00 PM
most 308 barrels are really chambered in 308 like you say, very few in 7.62x51, or 95 Palma
May be some lightweight 18" barrels coming soon from what I hear.
Toshu
Offline
Posts: 37
Feedback: 0% (0)
Link To This Post
Posted: 8/3/2011 7:16:09 PM
Originally Posted By Tim_W:
most 308 barrels are really chambered in 308 like you say, very few in 7.62x51, or 95 Palma
May be some lightweight 18" barrels coming soon from what I hear.


the DPMS SASS barrel is 7.62x51 and apparently is an accurately barrel
eightring
Member
Offline
Posts: 279
Feedback: 100% (10)
Link To This Post
Posted: 8/4/2011 5:20:31 PM
What's wrong with shooting military surplus ammo in a .308 chamber?
LOMartin
.Emesis Member.
Offline
Posts: 1028
Feedback: 100% (104)
Link To This Post
Posted: 8/4/2011 8:10:32 PM
Originally Posted By eightring:
What's wrong with shooting military surplus ammo in a .308 chamber?


Nadda, the problem some say is shooting .308 ammo in a 7.62x51 chamber.
.308 greater pressures then 7.62x51
cityboy172
Member
Offline
Posts: 1516
Feedback: 100% (9)
Link To This Post
Posted: 8/4/2011 8:20:28 PM
[Last Edit: 8/4/2011 8:22:40 PM by cityboy172]
Basically, the only differences are 7.62x51 is has a .005" longer chamber spec, and the 308 has a 62,000 psi cartridge spec and 7.62x51 has a 50,000 psi cartridge spec. I Honestly wouldn't worry about changing your barrel unless your just looking for a reason to rebarrel your rifle.

the part right under the big blue section is what your looking for.

Read this.
indianashooter.com - active member
Lmccrock
Member
Offline
Posts: 545
Feedback: 100% (2)
Link To This Post
Posted: 8/4/2011 10:30:42 PM
Originally Posted By eightring:
What's wrong with shooting military surplus ammo in a .308 chamber?

DPMS worries about the brass being too big for their 308 chambers which are a little tight.

From their forum::

In a DPMS rifle it is safe to shoot both 7.62x51mm and .308 from the 7.62x51mm chamber.

We do not recommend 7.62x51mm in a .308 chamber though due to extraction issues and increased wear.


Oh, and the pressure thing, it is 62000 PSI for 308, and 50000 CUP for 7.62x51. They are measured differently and are not equal units. There is correlation, but they are not equal. Correlating PSI and CUP

TaylorWSO
Kool-aid
Offline
Posts: 11398
Feedback: 100% (10)
Link To This Post
Posted: 8/5/2011 1:38:39 AM

Originally Posted By Lmccrock:
Oh, and the pressure thing, it is 62000 PSI for 308, and 50000 CUP for 7.62x51. They are measured differently and are not equal units. There is correlation, but they are not equal. Correlating PSI and CUP



The TM 43-0001-27TM 43-0001-27 has the 7.62 at 50/52K PSI not CUP. Your assumption is wrong
Anything is possible, everything is temporary