thanks I get it now

What pushes out the cartridge after firing
is it just the pressure from the spring behind the cartridges

Anything would be appreciated

Man I wish I had gotten my posts up, I would definitely have voted for you

what I did with this design was when the barrel goes into the reducer I just changed it so the 1" section went all the way through and put a coupling on the end of it. I think it gives a much better seal

now I have it painted

I ran out so I couldn't finish the barrel

the barrel ratio for the big cannon is 2.5:1

Yeah I find the breech works really well

yeah I got to get better on the stains
I got some paint though so I should be able to start that pretty soon.
I think that for my next cannon I'm going to use a piston valve

That is a belt it was the best thing i could find to brace the whole thing

yeah I know I got the wrong paint the first time so I got to go and buy some.

The stock is there to hold the scope when I get it but that might be a while.
I just had the sprinkler on the bottom because it fit for the trigger

this is my first rifle. the chamber is 22" long made of 1.5" pvc(38 cub. in.) the barrel is .5 in and is 4' long (9 cub. in.) The ratio is a little high at like 4:1 but it works out good. the valve is just a 1 in sprinkler valve. the breech is from PVC ballistics with a slight change. The stock is b...