Post questions and info about safe and unsafe materials that can be or should not be used to construct a launcher. Also post things about different universal accessories for your cannon (breech loader, muzzle break, etc.)
i have 4" sdr pipe that is rated at 200 psi. would it be safe to use that as a combustion or pneumatic chamber without having to sleeve it? It is just about as thick as reagular 4" pipe unlike the difference in the 2" pipes