right, i figure i am really only looking 100 ish feet.

how much larger does the chamber need to be to get say 200 yards? just so i know....

thank you very much everyone, i had only built co2 cartridge cannons before, and was not thinking fully.

i have added more piping to act as the pressure chamber.

i have added a palmers sideline reg so act as a saftey for the tank just in case orings blow or whatever.

the safety relief valve ...

Ok I have most likely 90% of the parts I need. Hopefully you guys can help me with the other 10%.

The tank is said to be adjustable 0-1200 psi, i will most likely use a palmers stabilizer which will act as a safety. is this needed?

am i going to be better off using compressed air or co2 ...