What pressures are you using in this? 120PSI from a standard compressor or like Nitrogen/Helium?
I do have a regulated nitrogen cylinder on hand but for safety's sake we're using the plant air suplly, aroind 70-80 psi
If you have more of that hydraulic tubing around, make a chamber out of it.
Don't tempt me! - but I think we've reached the practical limit of power that can be safely used within what it after all a chemical plant.
And after all that stuff you tell DYI about shooting his shed, you go and shoot a reinforced window
I was holding the barrel, my colleague opened the air supply and - nothing. I turned round thinking "dude, WTF?", raising the barrel slightly in the process, and *whoomph*

at least I wasn't deliberately aiming at it hehe
re: the phone, it's around $300 US, surely you can spend a lot more these days? I'll try and get some better pictures this morning, but I'm trembling in my safety boots worrying abvout that 2.75" ball flying at any velocity
