Ok, I been trying to get it to work and the regulator is acting very strangly,
We've starting off the the end cap almost completely undone then screwing it on slowly until it got to the desired pressure. We then fired the ram and the pressure wouldnt go back up and stayed very low. We tighting up the end cap a very little bit further, dumped the system and pressure up (by gently turning in the valve on our fire extinguisher) then the pressure went off the scale in under a second and the ram fired with extreme force, we then dumped the excess gas and there was a lot more than usual in the pipes. We we not using a buffer tank but had very long pipes.

Can someone please tell me what I did wrong?