Okay, thank you

Yeah, It's 36" long and then there is a little less then a foot of 3". I just rounded up for convenience sake. How much bigger do you think it should be?

What is a common volume for meter chamber? I think I did my math way wrong and when I redid it I got 1.1 cubic inches. Is that close?

Edit: The main chamber of the meter is 6" of 1/2 inch piping. I got a final psi of 290. Is that possible to get out of a propane tank?

Oh thanks, I didn't read the page close enough. I can't wait to get this thing going

THe gun is around 500 cubic inches and the meter pipe is about 20 cubic inches.

I have built a propane meter and am wondering how much psi you use to fill your launcher. I figured it to be 3 psi in the propane meter, that seems really low to me.
I used the plans from mfanda.net (thanks for the great website). My chamber is 4" in diameter and 3 feet long.
Thanks for any help ...

I too have thought about several ways to do this. I don't know if it would be possible to use pvc to make it. And since I don't have a welder I don't know when I would have a chance to use it. I think the best way would be to have an outer pipe that could slide back and forth over the barrel to ...

Thanks, and sorry I didn't know about the search feature before now.

I just got back into spud guns and have questions about propane. Is it okay to use in guns? And if so what is the easiest way to use it. The gun I would use it on has a 4" diameter chamber 40" inches long with a 10 foot barrel. I want to make it easier to shoot then having to mess with hairspray ...