crazedguy
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Using a .22 round or centerfire as an initiatory?
The primer has lead azide in it, and I've read about some body using a torch to detonate the primary in it. But on mythbusters they use electricity to
detonate them.
So the question is could you cast something like ETN into the .22 casing and have easy cheap detonators?
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hissingnoise
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| Quote: | | So the question is could you cast something like ETN into the .22 casing and have easy cheap detonators? |
Not if you value your eyes and fingers ─ ETN is dangerously sensitive when heated!
And the small size of .22 cartridges makes them of little use, overall . . .
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Motherload
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I am not going to say ... "If it were that easy everyone would do it".
But rather tell you from what I understand .... The amount of Azide in the case is minuscule.
It's enough to generate a spark for a flammable propellant but not enough to detonate ETN.
I tried making caps with PETN and magnum rifle primers..
Not getting consistant detonation.
"Chance favours the prepared mind"
"Fuck It !! We'll do it live !!"
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crazedguy
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Auto ignition for lead azide is 330C ETN melting point is 61C.
Motherload gave me the answer i was looking for though.
But could you extract the lead azide from a few using say acetone and make a cap from that fairily easy?
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Ral123
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What's wrong with a thick straw with AP and recrystalized, stabilised with urea ETN? If the straw is warped with Al foil where the AP is, that would
provide additional confinement. cheap-reliable-convenient what more? Lead azide has flame sensitivety issues you know...
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crazedguy
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Using a case as a detonator would require zero synthesizing of a primary and be fairly mass producible, so could be of quite a bit of use if it
actually worked.
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Farnsworth
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The main ingredient in most percussion primers is actually lead styphnate. A few contain minute amounts of azide, but so little as to be of fairly
unusable consequence.
That being said, lead styphnate itself can be used as a primary effectively. It's VoD and brisance are fairly comparable to lead azide, and the
difference can be made up by slightly increasing the quantity and confinement. A couple grams in good confinement with 250mg or so of ETN pressed
under it makes for robust and reliable initiations for most energetics. Orders of magnitude safer to handle than TATP or HTMD as well. Just beware
of heat and static, as styphnate is very spark sensitive.
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Ral123
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Yes because straws of AP are so expensive. For me reliability is priceless and these 0.22 cartridges would be junk. May be the primer cap is a good
detonator for only one secondary-lead picrate 
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The_Davster
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Quote: Originally posted by Farnsworth  | The main ingredient in most percussion primers is actually lead styphnate. A few contain minute amounts of azide, but so little as to be of fairly
unusable consequence.
That being said, lead styphnate itself can be used as a primary effectively. It's VoD and brisance are fairly comparable to lead azide, and the
difference can be made up by slightly increasing the quantity and confinement. A couple grams in good confinement with 250mg or so of ETN pressed
under it makes for robust and reliable initiations for most energetics. Orders of magnitude safer to handle than TATP or HTMD as well. Just beware
of heat and static, as styphnate is very spark sensitive. |
Lead azide and lead styphnate are nowhere near comparable in terms of initiating ability.
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The_Davster
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Thread Closed
14-12-2012 at 02:47 |
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