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BKTJ
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Posted: 12/22/2008 4:36:31 PM
I have a RRA barrel with the markings 212 C-P 7. Its a 16" mid legnth barrel.
Anybody know, for sure, what the markings mean? RRA to my knoledge doesn't offer a 1 in 7 twist, so I'm not sure what he 7 is.

Thanks,

TJ
Catman2
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Posted: 12/22/2008 4:45:25 PM
Originally Posted By BKTJ:
I have a RRA barrel with the markings 212 C-P 7. Its a 16" mid legnth barrel.
Anybody know, for sure, what the markings mean? RRA to my knoledge doesn't offer a 1 in 7 twist, so I'm not sure what he 7 is.

Thanks,

TJ

Ain't sure what the markings mean but RRA does offer a 1-7 16", it's available on
it's Entry Tac and I believe they offer a 1-7 Wilson 14-5".

JazzFan
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Posted: 12/22/2008 4:53:59 PM
came across this last week...

New Codes:
The actual base part number from our parts system/catalog, located over the chamber. These are the most common. Unless indicated otherwise, all stainless barrels are 1:8 twist and all moly barrels (chrome-lined or not) are 1:9.

All 16" moly barrels have a NATO chamber, while the 20" moly and all stainless barrels have a Wylde chamber.

200 =moly CAR
200CL =Chrome-lined CAR
202 =moly R4
204 =Chrome-lined R4
205 =Chrome-lined light-weight R4, 1:7
206 =Stainless CAR
208 =16" varmint
210 =moly Mid
212 =Chrome-lined Mid
215 =Stainless Mid
218 =18" varmint
219 =Chrome-lined light-weight R4, 1:9
220 =moly Std (rifle)
221 =Chrome-lined Std (rifle)
222 =Stainless NM(rifle)
223 =Stainless NM (rifle), unthreaded
226 =20" varmint
228 =24" varmint (1:8)
229 =24" varmint (1:12)

There may be "S" & "C" after the numbers. The "S" is for stainless and the "C" is for chrome-lined.
BKTJ
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Posted: 12/22/2008 4:54:15 PM
This is off a RRA mid legnth and the site only shows 1/8 or 1/9.
BKTJ
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Posted: 12/22/2008 4:58:41 PM
Jazz Fan,
Looks like the info I needed. Its a chrome lined 1/9 mid. The c-p could be for chrome mag particle, but the 7 after that is a mystery.

Thanks,
TJ
joemama74
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Posted: 12/24/2008 1:17:39 AM
Woohoo! Score! I was wondering what those markings were. I got Chrome Lined, didn't ask for it, didn't pay for it. Didn't look for it when I bought it because it wasn't supposed to be there.
michakav
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Posted: 12/24/2008 12:56:42 PM
[Last Edit: 12/24/2008 12:57:55 PM by michakav]
Originally Posted By BKTJ:
Jazz Fan,
Looks like the info I needed. Its a chrome lined 1/9 mid. The c-p could be for chrome mag particle, but the 7 after that is a mystery.

Thanks,
TJ



The P is an inspectors mark. Usually, if there is another mark after that it means that that barrel was pulled for additional testing (lot testing). I have not seen one that was a numeral though. It may in fact be marking that it is 1:7.
COSteve
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Posted: 12/24/2008 2:26:43 PM
[Last Edit: 12/24/2008 2:28:28 PM by COSteve]
Steve of RRA (RRAModerator in the Industry, RRA section) has a tacked thread where he provides the codes. As he works for RRA, I'm guessing its accurate.
Applicable "codes" for 223 barrels:

Old Codes:
Three characters side by side over the chamber.
First Character: N or W...N for NATO chamber or W for Wylde
Second Character: 8 or 9...8 for 1:8 twist and 9 for 1:9 twist.
Third Character: A, S, or C...A for moly (chrome -moly Alloy), S for Stainless, and C for Chrome-lined alloy.

New Codes:
The actual base part number from our parts system/catalog, located over the chamber. These are the most common. Unless indicated otherwise, all stainless barrels are 1:8 twist and all moly barrels (chrome-lined or not)are 1:9. All 16" moly barrels have a NATO chamber, while the 20" moly and all stainless barrels have a Wylde chamber.

200 Moly CAR
200CL Chrome-lined CAR
202 Moly R4
204 Chrome-lined R4
205 Chrome-lined light-weight R4, 1:7
206 Stainless CAR
208 16" varmint
209 Moly 7"
210 Moly Mid
212 Chrome-lined Mid
213 Moly light-weight Mid
213CL Chrome-lined light-weight Mid
215 Stainless Mid
218 18" varmint
219 Chrome-lined light-weight R4, 1:9
220 Moly Std (rifle)
221 Chrome-lined Std (rifle)
222 Stainless NM(rifle)
223 Stainless NM (rifle), unthreaded
225 Moly 10.5"
225CL Chrome-lined 10.5"
226 20" varmint
228 24" varmint (1:8)
229 24" varmint (1:12)
232 Moly light-weight CAR
232CL Chrome-lined light-weight CAR

YOU MAY START TO SEE SOME "S" AND "C" MARKINGS AFTER THE NUMBERS...THE "S" FOR STAINLESS AND THE "C" FOR CHROME-LINED...PRIMARILY TO HELP PEOPLE BOTH IN-HOUSE AND OUT TO KNOW AT A GLANCE WITHOUT HAVING TO REFER TO A CATALOG.

Steve/RRA

Edited 07-07-06 to include chrome-lined 20" rifle bbl (AR0221).
Edited 01-04-07 to include chrome-lined lightweight R4 bbls (AR0205 and AR0219).
Edited 01-30-08 toinclude the 7"(209), 10.5" (225), and light-weight CARs and Mids (232 and 213)
You may want to go over to that thread and ask him directly. LINK
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