recipe for rice hulls and bp

[eb11]

hey guys i am wondering if anyone could give me how they make there burst charge with rice hulls. i am currently using 4f bp and the shells lastnight all went up great and burst great but i blew the bottom out of my morter tube. i am thinking that using 4f bp for the burst charge is making the shell to heavy and i am needing more 4f for the lift charge so i want to lighten up the shells thanks

[sparky]

hey guys i am wondering if anyone could give me how they make there burst charge with rice hulls. i am currently using 4f bp and the shells lastnight all went up great and burst great but i blew the bottom out of my morter tube. i am thinking that using 4f bp for the burst charge is making the shell to heavy and i am needing more 4f for the lift charge so i want to lighten up the shells thanks

Well my guess is that you arent using hdpe tubes are you.First weigh out the hulls and the bp alot of the ratios depend on what size shells you are making.After that you can soak the hulls in water for 15-20 min strain them of excess water and coat them with your mix in the roller or a baggie if they dont pick up anymore powder you have to spray them.Are the tubes from kits,cardboard or hdpe.

[eb11]

they are hdpe tubes i blew the bottom plug out of the tube and the bottom of the rack the tube is fine. my next question is there a weight for the rice and bp like 50 grams rice to 25 grams bp or is it just till the hulls are coated.i am making 2 inch shells Edited September 1, 2012 by eb11

[sparky]

they are hdpe tubes i blew the bottom plug out of the tube and the bottom of the rack the tube is fine. my next question is there a weight for the rice and bp like 50 grams rice to 25 grams bp or is it just till the hulls are coated.i am making 2 inch shells

with that small shell and the hulls taking up space i would go like 7parts bp to 1part hulls by weight,Also a booster wouldnt be a bad idea slow flash or whistle,You could also use a more energetic carrier for the hulls like kp burst charge

[Seymour]

Or normal hot 70/30. I'm a fan of using standard flash for booster.

 

Well my guess is that you arent using hdpe tubes are you

 

Actually, HDPE tubes that are not of the one piece type are not immune to plug blow outs. While the strength of the plug is dependent on how well secured (generally the number and spread of the screws/bolts, and the quality the wood or other plug material, the boolts/screws are prone to rip through the HDPE, or with lower quality screws/bots and or wood, bend them and tear the plug up.

 

None of this should happen with a good plug though, if the shell is lifted without excessive enthusiasm and a respectably massive shell on top.

 

I would expect 5:1 BP on hulls is the most common ratio for general use,and many people do take a 'one size fits all' approach, often tweaking with boosters. But, as Sparky said, it's alo quite common to tailor the ratio to your shell size. Similarly very large shells often use a lighter coating.

 

Personally for two inch shells I use rough powder. Essentially ball milled dust BP with a little binder added 1-2% Gum Arabic for me, but usually Dextrin, which is wetted enough to make lumps that are just moist enough to for solid lumps with had pressure, and these lumps are granulated with a grater or coarse sieve. While this does not use a filler, the density is about half that of pressed, corned and polished grain.

[dan999ification]

grated then gently reformed and grated again makes very porous lightweight grains that burn fast i use this for lift and break on small shells ( 1 and 2 inch) makes life easy.

 

Dan.

[dynomike1]

I kbnow i am sounding dummer by the day but i am one of those people that do better when i see it than when i read it.

Ok 5:1 BP, rice hulls is that like 1oz of rice hulls and 5oz of BP?

[Algenco]

I kbnow i am sounding dummer by the day but i am one of those people that do better when i see it than when i read it.

Ok 5:1 BP, rice hulls is that like 1oz of rice hulls and 5oz of BP?

 

yep, you got it!

 

The only dumb/stupid question is the ones you don't ask.

 

Please feel free to ask about anything you don't understand

 

unless your making 6" or larger shells you don't really need to use coated hulls, unless you intend to use boosters.

 

I like them because Arthritis makes it difficult for me to rice BP

Edited November 9, 2012 by Algenco

[dynomike1]

Thanks OLD buddy Ha Ha What are you doing just filling four and five inch shells with stars?There is a big hole in the middle if you just line the wall with stars and shouldn't take that much powder. The reason i asked cause everything i have seen four inch and up had rice hulls. Not doubt en you just trying to figure out how to do it with the rice hulls. Oyea how many half inch balls needed in a three lb jar? Edited November 10, 2012 by dynomike1

[Algenco]

Well REALLY OLD buddy , you'll need all that space for break, it takes that much hot powder to get good breaks on those size shells.

Most powders will need to be boosted, even with hot powder coated rice hulls isn't powerful enough in most cases

[Potassiumchlorate]

Meh, use H3 instead. You will need no booster and also less pasting. 1:1 is sufficient for 6" Edited November 10, 2012 by Potassiumchlorate

[bob]

Thanks OLD buddy Ha Ha What are you doing just filling four and five inch shells with stars?There is a big hole in the middle if you just line the wall with stars and shouldn't take that much powder. The reason i asked cause everything i have seen four inch and up had rice hulls. Not doubt en you just trying to figure out how to do it with the rice hulls. Oyea how many half inch balls needed in a three lb jar?

two hundred is what I use

[dynomike1]

Well i'm still in the Charcoal streamer mode. I can see my FG leaving now but that's what it takes. I have my chem. dying to try BP again. maybe i'll get it right this time. You know that batch of BP i made the other day i dried it milled it and it took an act of congress to get to light when it did it was slow burning so i chucked it. I may just order me some more 2 or 4 FG till i get it right. I do appreciate yalls help.

[bob]

sorry if some body has already asked this but how long are you milling your powder for dynomike? in my three lbs mill using 200 hundred balls it takes 16 hours

bob

[dynomike1]

I only have a 100 balls so i am doing 24hrs. i tested some @ 18hrs. and it burned like a star.

[bob]

you might want to try a little longer, like say 48 hours it can't hurt

bob

[dynomike1]

Well @ 18hrs. it was kinda stuck to the walls so i poured it out.

[AirCowPeacock]

If its sticking to the walls no amount of milling is going to make a real differnece--all its going to do is kill your media and contaminate your BP with more lead then it needs to be. Are you drying it?

[dynomike1]

Ground the PN and SU then dried everything.

[AirCowPeacock]

How?

[dynomike1]

Coffee grinder- dehumidifier.

[AirCowPeacock]

dehumidifier using...dessicant? Which one? How much? and what is the humidity around there? I suggest MgSO4 or CaCl2. I dessicate it for 1-3 days before every mill.

[dynomike1]

Electric Dehumidifier I am waiting on dessicant bags 31% last night 100% usually around 55% what i made last night burned just a little slower than 777. Don't know about this MgSO4 or CaCl2 Edited November 13, 2012 by dynomike1

[AirCowPeacock]

Anhydrous MgSO4 can be made by baking epson salt in an oven at like 350 for 2 hours. Alot of road salt is CaCl2. Make sure you dont get any roadsalt with NaCl.