Thanks for the links. Is it possible to make my reservoir in a U shape instead of having a straight singular tube? I could then do an Over-under design with the reservoir and decrease my pressure because the volume is increased, correct? To get roughly 300psi I would need to use 10" of 1.5" diameter...

Thanks! I'll be using the GGDT shortly. It looks like a great program. Yes, sort of like the Leichter Ladungswerfer it would sleeve over the barrel. From the 12g Co2 chart it seems that the pressure rises significantly below 3" diameter. For my application the largest diameter I can fit would be 2" ...

Greetings, :D This is my fist post on this forum and I'm pretty new to it all. I am currently planning to make a small pneumatic line launcher that can launch roughly a 1 to 2 lb (.45kg to .9kg) projectile with a pretty light kevlar line approximately 45 feet (13.7meters) . Ideally the entirety of ...