propellant fouling

propellant fouling

[prə′pel·ənt ¦fau̇l·iŋ]
(ordnance)
Bits of unburned or partially burned propellant left in the bore after firing.
References in periodicals archive ?
Since the chamber of a gas gun collects propellant fouling and debris at a much higher rate, I believe it is best to seat bullets no closer than .
When the pellets did finally burn, the combination of this extra space and primer and propellant fouling would create a nasty crud ring where the pellets and sabot/bullet met.
This means that no parts other than the barrel ever have to be cleaned of propellant fouling The Electra "trigger" is actually an electronic switch, so the trigger pull is incredibly clean.
Propellant fouling from shotshells along with field debris such as grass, weed seeds and dust can accumulate inside the receiver and can tie up the innards of a semiauto enough to cause it to refuse to shoot.