Total noob with a 10 meter Air pistol

Raydee,

If you pressurized the cylinder, with a handpump (or from a larger scuba tank), and release the bleed screw, you will loose all pressure in the cylinder. You need pressure behind the cylinder as you unscrew it, you'll hear the loss of air as you unscrew it. The faster you unscrew it, the less air you will lose.

Tom Holland 

Field Target Tech 

Fieldtargettech.com