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-   -   Noncorrosive Chart (http://forums.thecmp.org/showthread.php?t=5821)

dfancysr 01-12-2010 11:37 AM

Noncorrosive Chart and additional cleaning info
 
This chart lists dates and beginning lot numbers for noncorrosive production.
It was published in TN9-1305-200 dated June 1961.
I suggest you right click on the chart and save it to your computer with a descriptive name.

Dave



Photobucket wants me to pay to host 3d party viewing. I will not pay. Hopefully another member can repost the chart. Sorry.

Post #66 on page 7 by JMM has the chart viewable.

jarheadteacher 01-12-2010 09:26 PM

sweet
thanks for sharing !

dfancysr 02-09-2010 08:09 AM

Korean M2 Ball basics
 
here is the info from the Korean Ammo post below

Korean

This is the surplus Korean M2 Ball. It is good quality and decent for plinking and some lots are more accurate than others. It is found packed in 20 round boxes or in Garand clips.

The two choices are:

"PS" headstamped (Poonsang Metal Corp, Seoul) Sometimes confused as "P8".

"KA" headstamped (Korean arsenal, Pusan)



Notice the headstamps below. The ammo is identical to USGI ammo and performs similar. Accuracy was about 3-4" @100yds with an "average" Garand. The cases are ALL Boxer primed and reloadable, just remove the crimp first.



There are a few drawbacks....namely in that ALL "KA" ammo is corrosive so clean accordingly. While the "PS" ammo is non-corrosive there are a few problem batches of ammo, namely lot 2-152 and 156. These are all '75 dated and have had splits that run into the primer pocket. It is interesting to note that the US had similar problems at Frankford Arsenal in the 20's & 30's. One, the brass "disks" that were to be formed into cases were too close together and they got nicks in them. These nick caused cracks to form down the case and they could ruptere under pressure. On some of the Lot 2-152 cases you can actually see the "nick" near the case head. These will definitly split when fired. The other was from the headstamp die being offcenter and it too caused a "hard or brittle" spot on that side of the casing.

The reason for this may be that the Poonsang factory didn't start production until late 1973 and possibly got a bad batch of brass early on or they were just having some start up problems. Later years and different calibers do not have any problems. Buy this ammo up now while it's still around, you may regret it one day!

VMFn542bob 03-22-2010 12:24 AM

Quote:

Originally Posted by dfancysr (Post 44367)
. . . I suggest you right click on the chart and save it to your computer with a descriptive name. Dave

Here is a link to the same chart but for 30 & 45 cal only.
(Reference TM9-1305 - 200 June 1961)
http://www.cartridgecollectors.org/3...mo-nctable.htm

Oldloader 04-25-2010 02:57 PM

Wonder if someone would be kind enough to confirm my interpretation of the ammo I have. LC 54, Lake City; TW 54, Twin Cities; non-corrosive, ok to shoot. DEN 43, don't see it listed anywhere but assume definitely wartime and corrosive.

dfancysr 04-26-2010 11:05 AM

Denver closed down after the war and never made non corrosive primed ammo. That is why it is not listed on the chart.
The LC and TW both are dated after the conversion.

Dave

Oldloader 04-26-2010 05:29 PM

Quote:

Originally Posted by dfancysr (Post 109885)
Denver closed down after the war and never made non corrosive primed ammo. That is why it is not listed on the chart.
The LC and TW both are dated after the conversion.

Dave

Very good thanks. Guess I will treat the DEN 43 as collector ammo.

ender 05-01-2010 02:16 PM

The kind folks at the CMP just announced the headstamps found on the first (only?) batch of AP that will be offered and it includes AYR and HXP. Do we have info for these types as well?

Moops 05-08-2010 08:46 PM

I liked this small article and chart about corrosive ammo.
http://www.ashlandlakegunclub.org/do...rimerRedux.pdf

Bennett8 05-11-2010 12:14 PM

Den 43
 
I have two cans of the stuff -- it is on 5 round strippers in 60 round bandoleers with cards indicating a LC repack. I am slowly working my way through the first can and it is good shooting stuff and easy to handle with corrosive cleaning techniques. I dunk the brass in soapy water after shooting and am using it for relaods. It gives great service in modest loadings and I have had no problem with case corrosion or splitting. If it was in its original packaging, I would preserve as collector stuff, but otherwise see no reason not to shoot it.

battlerattlem1 06-02-2010 12:02 AM

Tw non corrosive m2 ball
 
About 2 years ago, I had a chance purchase 2000 rounds of M2 ball ammo with a TW 51 headstamp.
It was represented as corrosive primed by the seller, who was a local "expert". I got on this forum and discovered that Twin Cities was one of the first if not the first govt. ammo producer to go to non corrosive primers, December of 1950. Needless to say, I ran right back and let the seller try to convince me that I didn't want that old corrosive ammo, that he was selling for about one half the normal cost of M2 ball. I still have about 500 rounds and experimenting has shown that it groups about one half the size of the groups with HXP. At least with my ratty old correct grade HRA.
And some people say these forums are not helpful.
Bull puckey.

.22shooter 02-14-2011 07:27 PM

So if a can of ammo has a lot number higher than the one listed for that manufacturer it is non-corrosive?

Example: SL 9420 non corrosive on the chart. Is SL 9779 non corrosive then?

Craftsman 02-14-2011 11:30 PM

Quote:

Originally Posted by bsrman36 (Post 286104)
So if a can of ammo has a lot number higher than the one listed for that manufacturer it is non-corrosive?

Example: SL 9420 non corrosive on the chart. Is SL 9779 non corrosive then?

Yes.

saltydog452 07-17-2011 10:12 AM

Cans can be swaped about, headstamps remain.

Rookie asking, if I read it right, any domestic M2 '06 ammo with a post 1945 headstamp is non-corrossive?

What about foreign headstamps? Buyer beware?

EDIT: Just read the brief refering to Korean and Canadian mfgr, how about Greek, or...?

Thanks,

salty

dfancysr 07-21-2011 09:29 AM

Domestic M2 ammo with headstamps after 1953 can be assumed to be non corrosive. the crossover dates are in the chart on page 1.

gamblelane 07-26-2011 07:40 PM

FN Herstal 1955
 
I was just given 300 rds of 30-06 in boxes marked "cartuchos" but they are made 1955 in Belgium. Are they corrosive primed?

glassmountains 07-28-2011 09:46 AM

It's a safe bet that they are. The Europeans did not switch to non-corrosive primers until the late 50's early 60's.

GunZila 08-04-2011 08:16 PM

thanks for sharing !

Parker1942 10-14-2011 08:41 AM

Is there a sure fire (no pun intended) way to test whether ammo is corrosive or non-corrosive? I have been shooting KA-73 through a Garand and assumed it was non-corrosive. Thanks

LeadSpitter 12-02-2011 05:45 AM

Quote:

Originally Posted by Moops (Post 117711)
I liked this small article and chart about corrosive ammo.
http://www.ashlandlakegunclub.org/do...rimerRedux.pdf



Sadly they didn't cover or list the ammo made at or that came from NAMMO. :(

LeadSpitter 12-02-2011 05:51 AM

Quote:

Originally Posted by dfancysr (Post 44367)
This chart lists dates and beginning lot numbers for noncorrosive production.
It was published in TN9-1305-200 dated June 1961.
I suggest you right click on the chart and save it to your computer with a descriptive name.

Dave

http://i178.photobucket.com/albums/w...osiveChart.jpg


Same for this chart. Sadly it doesn't include or say anything about NAMMO or the AYR ammo. Seeing it included in this chart or the information at the link in the post above would sure be definitive for all concerned. Instead, as far as I'm concerned, I don't know what to think or believe.

I say this because I was always told up until the late 50-s or into the early 60's, depending on the manufacturer, if European made and Berdan primed, treat it as corrosive. Thing is, because I have NEVER shot corrosive ammo nor did I plan on it, I never worried about it nor did I concern myself one way or the other with what I was told as stated above. As I've said in most every other post on threads regarding this, ASK ME, I HAVEN'T A CLUE!

J.R.2009 01-09-2012 11:01 AM

Just poking around this thread and saw the remarks about the loose stuff having WWII corrosive rounds mixed in with the HXP. My understanding was that this ammo, in spite of the "joke" about it being "floor sweepings", came off of linked ammo belts. CMP has a crew that was sitin', delinkn' and countin' and filling the ammo cans. I will assume that the counting was just base on 200+ round belts. And since mine have all been OVER the 200 count they didn't count each case as they dropped them in those cans.
I can't imagine those folks looking at every case head stamp to be sure we didn't get a "bad" one.

BUT, all that said I do think CMP should change the description a bit. Maybe caution us that there "might" be other head stamps and "some" corrosive rounds mixed in.
What I won't complain about is the 200+ LC rounds ( non C ), the 100+ Winchester mix in the last few cans. Of the 1000 or so rounds I have received I have had only a very few corrosive, maybe 10+.
I'd still change the description a little just to CYA. :D

glassmountains 01-09-2012 11:06 AM

Quote:

Originally Posted by J.R.2009 (Post 502652)
......... My understanding was that this ammo, in spite of the "joke" about it being "floor sweepings", came off of linked ammo belts. CMP has a crew that was sitin', delinkn' and countin' and filling the ammo cans......

If that's the case, I wonder what happened to the links and/or belts.

lennnorment 01-09-2012 12:28 PM

Links/belts
 
Probably never left Greece.

thunderace4 09-28-2012 10:16 PM

SL 52 Headstamp
 
I have four enbloc clips SL52 headstamped 30.06 in brw1 clips. After reading the chart, without having the lot number, I am unsure whether it is corrosive or not. What do you think? As always, any help is appreciated.

J.R.2009 09-29-2012 09:05 AM

I'll be corrected if I am wrong but I don't think any of the SL 52 stuff was corrosive. I THINK I heard/read that the cut off for U.S. corrosive ammo in 06 was 52.

new cal shooter 10-03-2012 07:01 PM

Pic from nra mag about DCM corrosive stuff:

http://i1138.photobucket.com/albums/...m/DSCN0716.jpg

edlmann 10-04-2012 08:14 AM

Quote:

Originally Posted by new cal shooter (Post 677550)
Pic from nra mag about DCM corrosive stuff:

http://i1138.photobucket.com/albums/...m/DSCN0716.jpg

If the ammo you're checking is not boxed in original containers, and you can't discern the lot numbers, add one year to the headstamp to be safe.

billsm1 12-30-2012 04:16 PM

I have 2 boxes of WRA 23049, I don't see this on any chart. can anyone tell me if it is corrosive?
Bill

Good Ol' Boy 01-03-2013 11:48 PM

Quote:

Originally Posted by billsm1 (Post 732736)
I have 2 boxes of WRA 23049, I don't see this on any chart. can anyone tell me if it is corrosive?
Bill

Corrosive. WRA=Winchester

wdodd 02-18-2013 04:25 PM

Just reloaded a few 1903 stripper clips this afternoon from a recent shipment from CMP and found 2 TW 52 headstamps among the usual assortment of 66 to 78 mixture. On the HXP headstamps, the letter "HXP" are relatively close together as is the "two digit date". However, on the TWs each of the 4 markings are evenly spaced around the head (think as 5 @ 12 o'clock, 2 @ 3 o'clock, W @ 6 o'clock, and T @ 9 o'clock. Anyone has a clue as to why?
Thanks.

raymeketa 02-18-2013 04:37 PM

That's simply the way the headstamp bunter was made. It doesn't really mean anything is different about that ammo than any other TW.

Having said that, headstamp bunters worked the brass quite a bit, which hardened it. But, that's a good thing. And so, some bunters were made with the numbers spaced out in order to make the heads more uniform in hardness. Others were made with more letters and numbers than was necessary in order to achieve the same thing.

Maybe the TW numbers and letters were spaced out for one of those reasons. Or maybe not. The Army works in mysterious ways and sometimes they do things just because.

Ray

wdodd 02-18-2013 05:02 PM

Many thanks Ray !!

steve ingalls 03-27-2013 08:16 AM

Dick Culver listed an article titled U.S. GI Non- Corrosive Primers. It lists Start dates of non corrosive primer changeover, and an actual "Safe start Date". I copied the article off a forum link some time back. Google the title and authors name and it pops as an odcmp link. Dont know how to link it, sorry. Info very clear and unlike the chart easy to read! Heres the link http://www.odcmp.org/1101/USGI.pdf

edlmann 03-29-2013 05:09 AM

Quote:

Originally Posted by steve ingalls (Post 804429)
Dick Culver listed an article titled U.S. GI Non- Corrosive Primers. It lists Start dates of non corrosive primer changeover, and an actual "Safe start Date". I copied the article off a forum link some time back. Google the title and authors name and it pops as an odcmp link. Dont know how to link it, sorry. Info very clear and unlike the chart easy to read! Heres the link http://www.odcmp.org/1101/USGIpdf. Link wont come up! . works if you type address in

You missed a period (.) between "USGI" and "pdf".

fixed liky thingy

steve ingalls 03-29-2013 05:57 AM

Thanks! Im not too computer savvy. Great info! Answers a lot of ammo questions on the forum. Address has been revised with period.

IamCaleb 07-04-2013 02:40 PM

I found these in my recent can of HXP. I have no clue on these head stamps, if anyone here knows...please share the info. Is it corrosive?

Three- SL 45
One- K 53

http://img.photobucket.com/albums/v7...psc16adb4e.jpg

http://img.photobucket.com/albums/v7...ps4570c8cd.jpg

steve ingalls 07-04-2013 04:32 PM

SL 45 is St Louis Ordinance Plant and IS corrosive. Don't know about the K stamp.

raymeketa 07-04-2013 04:35 PM

SL 45 is St. Louis Ordnance Plant, 1945

K 53 is very probably Kynoch Factories, England, 1953

IamCaleb 07-04-2013 05:16 PM

Thank you, I will keep them separate from the rest.


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