that last reply did no help at all. can someone give directions and/or a diagram of the ignition? thanks

andrew that made no sense at all it just confused me more and some one give me a diagram

can u explain the ignition a little better? please

why do u keep having to long back in?

can someone help me i need to kno this for building my cannon

if im goin by the 1.5:1 ratio and my chamber was 3in my barrel would be 2ins? how do i find the right length? or does it not matter?

but what does that mean?

is there any equation i should use to find how big to make my chamber and barrel?

why does every one u pvc piping?why not steel? or somehting else?