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What is the "best" burst for a 1 1/2 " to 2" shell ?


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#1 Green_as_my_powder

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Posted 31 March 2009 - 12:16 PM

Fellow Pyros,

I'm trying to improve the burst of my shells. I've been using BP coated rice hulls for "soft breaks", like willow shells, and adding about 3g of whistle powder for regular shells. I'm not getting very symettrical breaks. I tried 2g of flash powder which gave a better break, but the bright flash was a little distracting from the dimmer stars.

Any suggestions appreciated.
And the priest shall take from the cereal offering its memorial portion and burn this on the altar, an offering by fire, a pleasing odor to the LORD.
(Lev 2:9)

--seems to me that if God likes the odor of burnt cereal, He's just gotta love gunpowder...

#2 Vic

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Posted 31 March 2009 - 09:40 PM

Hi
I presume you are using round shells as opposed to cylindrical shells, you are going to be hard pressed to get a symmetrical break from a 2” or smaller, best to go up to 3” and on these a 1g flash booster is plenty I find. Star sizing and neat loading of the shell is needed to get a good round break
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#3 seymour

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Posted 31 March 2009 - 09:48 PM

You can use Perchlorate compositions with heavy confinement, or, if you feel up to managing the responsibility, H3 (Chlorate and charcoal). Good whistle will work. You could work on that a bit more.

Other than that, there is not much other than BP + flash. The flash is an issue, but it can be reduced by using finer Aluminium, an over oxidised flash mix or by using bright stars to mask it.
The monkey leaped off it's sunny perch and flew off into the night sky.

#4 Mumbles

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Posted 01 April 2009 - 04:19 AM

If you're a member of Passfire, look for some posts of Eugene Yurek. Well, first make sure to find a comfy chair he is very ........thorough. He's been able to make 2" ball shells break much like the commercial stuff I can get. He does this with BP on hulls, and a NC granulated whistle mix (1g I think). If you're using plastic shells, try pasting them with a few layers of paper.




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