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Does anyone know of a Gunsmith in Sacramento area that can ream barrels, I have a 6.8 saami spec that I want reamed to 6.8SPCII.
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Scars phyiscal or mental remind us of where we've been, they don't have dictate where were going -
Do you have a link that shows the difference between these two? I have been looking into 6.8 SPC since I have collected almost 1000 pieces of once fired brass and want to see what the diff is. Is it a BR thing where it is a little tighter for improved accuracy or is it a general improvement?
-G -
The spec-II has a longer lead in the throat area, it's like the difference in .223 & 5.56, nothing about the cartridge is different just one chamber can handle more pressure due to having more room before the bullet contacts the lands, I think SAAMI is .050" and spec-II is .100" or something similar but you get the ideal.Scars phyiscal or mental remind us of where we've been, they don't have dictate where were goingComment
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So, you just need a 6.8 throater? If so, contact 4-D at Reamers@4-dproducts.com
If they have one, they'll rent it for about 30 bucks........you can do it yourself.Last edited by Skipper; 04-29-2010, 11:03 AM.sigpic
The strongest reason for the people to keep and bear arms is, as a last resort, to protect themselves against the tyranny of government.
-- Thomas JeffersonComment
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Got a link for the development of this change? I'd be interested in knowing the origin of this change.
-GComment
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6.8 reamer
MY 6.8 is old spec, I was looking to have it reamed to new SPCII SpecScars phyiscal or mental remind us of where we've been, they don't have dictate where were goingComment
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Have you checked at the 6.8 forums?:
As I understand it, the only difference is a .100" longer throatsigpic
The strongest reason for the people to keep and bear arms is, as a last resort, to protect themselves against the tyranny of government.
-- Thomas JeffersonComment
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Try 68forums.comScars phyiscal or mental remind us of where we've been, they don't have dictate where were goingComment
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Don't ream if your barrel is chrome-lined.
Bill Wiese
San Jose, CA
CGF Board Member / NRA Benefactor Life Member / CRPA life member
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legal advice, which can only be given by a lawyer.Comment
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The origin of the change was to fix the problem with SSA Extreme bullets that are no longer produced.
The bullets were hardcast lead with copper plating and could not handle the pressures.
The result is that the bullet would shed a ring of copper/lead in the neck of the chamber and the next round to try to go through would pop primers and generally cause problems.
So SSA suggested to people to lengthen the throat so that the bad bullet could slide further into the throat.
That fixed the problem of the bullet shedding it's tail.
With this newfound case volume, people started loading rounds to higher pressures as the longer throat lets the bullet slide forward more before obturating to the rifling and the chamber effectively grows.
This extended chamber is ONLY an advantage if you use over SAAMI pressure SPEC ammo.
All the major ammo makers follow the SAAMI specs except SSA.
If you are using SAAMI ammo, use a SAAMI chamber and you will get better velocity.
When you use SAAMI spec ammo in an extended SPC throat, you lose velocity.
When you use SSA over-pressure ammo in a SAAMI chamber, you get pressure problems.Last edited by ar15barrels; 04-29-2010, 4:02 PM.Randall Rausch
AR work: www.ar15barrels.com
Bolt actions: www.700barrels.com
Foreign Semi Autos: www.akbarrels.com
Barrel, sight and trigger work on most pistols and shotguns.
Most work performed while-you-wait.Comment
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Scars phyiscal or mental remind us of where we've been, they don't have dictate where were goingComment
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That's funny.
I was making 6.8 barrels before SAAMI standardized them and well before Harrison ever started selling uppers...
I actually own www.68spc.com, though I have not really done anything with it.Randall Rausch
AR work: www.ar15barrels.com
Bolt actions: www.700barrels.com
Foreign Semi Autos: www.akbarrels.com
Barrel, sight and trigger work on most pistols and shotguns.
Most work performed while-you-wait.Comment
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I will call you, I'm thinking maybe I should go with a new barrel and go 20"Scars phyiscal or mental remind us of where we've been, they don't have dictate where were goingComment
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Thanks for the infoScars phyiscal or mental remind us of where we've been, they don't have dictate where were goingComment
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