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Author: Subject: shock sensitive mixtures containing k-chlorate
Hermes_Trismegistus
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[*] posted on 26-5-2008 at 22:45
shock sensitive mixtures containing k-chlorate


Hi guys,

Does anyone have a C.O.P.A.E handy? I've missplaced mine, and I'm curious to see some mixtures including K-chlorate as the oxidiser in priming compounds.

I came across something interesting in another hobby, (firearms) and was quite suprised. Apparently, these chlorate based priming compounds were used in the old military ammunition, like the .303 for the SMLE, for quite a long time, and of course left a nasty KCl residue in the bore, which is why the old british soldier was taught to clean his rifle compulsively.

EDIT:

Someone just clued me in to the fact that COPAE is available in the library section of the forum.

I guess it's been a few years now, since I've been active on the forum...I like what's been done with the place...very nice.!


:)

[Edited on by Hermes_Trismegistus]




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[*] posted on 26-5-2008 at 22:56


KClO3 + red P? A well known mixture...

Tim




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[*] posted on 26-5-2008 at 23:11


Seems a bit farcical for someone to try pass a patent for armstrongs mix just last year, but anyway.

<b>Red phosphorus-containing primer composition for percussion caps or for small arms ammunition cartridges</b>. GB2437076
http://v3.espacenet.com/origdoc?DB=EPODOC&IDX=GB2437076&...
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[*] posted on 27-5-2008 at 05:06


I have seen some mixtures mentioned where the lead primary is mixed with KClO3, for reasons I never discovered. However I have never seen mention of KClO3 being used without being mixed with a primary HE for primers.
Such mixtures were still being used until the 50s-60s in soviet block ammo.

[Edited on 27-5-2008 by The_Davster]




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Hermes_Trismegistus
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[*] posted on 27-5-2008 at 10:15


Okey dokey, got it, armstrongs mixture with Boron Carbide (aka gritty filler). Now I'm left to wonder what sort of effect the gritty filler, is having on the bore as it whizzes through at up to 4000 fps.

Thanks guys.

[Edited on by Hermes_Trismegistus]




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[*] posted on 27-5-2008 at 21:37


You really didn't know what was in the old corrosive primers?

Ah well. Chlorate and Sulfur, or Antimony trisulfide... Various adjuncts to increase flame temperature and give hot spots, antacid stabilizers plus ground glass for increased friction.
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[*] posted on 27-5-2008 at 23:58


I have read that chlorate and copper powder mixes are stupidly sensitive, I have a text file on it somewhere from the PGI, I think. The file said that chlorate mixes made using copper tools were really unstable. Bert, do you know what I am on about?



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[*] posted on 28-5-2008 at 11:31


Quote:
Originally posted by -=HeX=-
Stupidly sensitive. . .


Nice phrase -=HeX=-, BTW. 'Remind anyone, of anyone?

I'll file down a bit of copper, grind a couple Kcl03 tabs and check it out. . .tomorrow!

'Hadn't heard of *that* mix before this!

'Interesting, though!

Whew! 'Back in the land of the living. . .

P

[Edited on 28-5-2008 by Pulverulescent]

[Edited on 28-5-2008 by Pulverulescent]

[Edited on 28-5-2008 by Pulverulescent]

[Edited on 28-5-2008 by Pulverulescent]




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[*] posted on 28-5-2008 at 11:45


Copper powder and red P look very much alike. . .

'Curious!

P




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[*] posted on 28-5-2008 at 13:28


Pulverulescent: 'stupidly sensitive' reminds me of either TCAP or my unstable emotions... :) but anyway... I will also try the chlorate and copper composition when I get more chlorate. I read it in a text labelled 'Chlorscreen' or some such mongrelised english. I will upload it whenever.



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