I was a little off. I was looking more at the combined law, as here:
https://en.wikipedia.org/wiki/Ideal_gas_law

My vague memories of chemistry had them the same.

The ideal gas law is probably more relevant to this, as it considers changes in pressure, volume, and temperature, all of which happen. You'll probably have to do it the same way I'm looking at when I someday get to more complicated projects--you measure your velocity, calculate your pressures and v...

Not exactly like how I want to make it, but glad to see I'm not the only one that likes the crazy stuff.

I've been prevented from messing with potato cannon for a while now, finances and such. This is looking up for 2020, so I've been looking into designs again. Goals are to get into higher pressure, scratch machining from aluminum (partly because of looking at higher pressure), and repeaters. I made a...