ammosmoke wrote: in theory there should be 1/3hydrogen to 2/3 oxygen....

Its actuly 2/3Hydrogen to 1/3 0xygen, hence H2O. And yes it is highly explosive so im going with a metal barrel. i'll post pics when i can but that may not be for a while.

I had a similar idea except there is no paper, the shell is completely sealed and i use a model rocket motor ignitor. you drop the shell into the gun from the front just like a mortor round. ill draw a diagram when i get the chance.

sgort87 is right. all i can say is DAAAAAAAAAAAAAAMB! that f-cker is sweet!

Thats cool but wouldnt it be underpowered?

I have on thing to say, BAD FUCKING ASSSSSSSSS!

For large bore guns you can put the bb's in a paper cup.

Recently I built an electrolysis machine. It seperates water into hydrogen and oxygen gas. Hydrogen and oxygen are highly explosive so I'm going to connect a cannon to it and see what kind of power I get. If anyone has any ideas or tips let me know. I was also thinking that hydrogen would be perfect...