This is new to me. I don't understand what you are doing, can you explain further?

The internet suggests the vapour pressure above a quantity of liquid CO2 at room temperature is abt 55 Bar, and that would be the pressure in a Powerlet or a CO2 fire extinguisher.

That level of pressure is well into "blow parts of your anatomy off" territory.

What hardware are you using to connect?

What kind of cylinders are you charging?

And to quote Seargent Wilson, "Do you think that's wise sir?"