SIG SAUER SIG556xi - Manual (Page 34)

34 www.sigsauer.com
waRning
3. firearms may be severely damaged and serious injury to the shooter or to others may result from any condition causing
excessive pressure inside the chamber or barrel during firing. excessive pressure can be caused by obstructions in the barrel,
propellant powder overloads, the use of incorrect cartridges or defectively assembled cartridges. in addition, the use of a dirty,
corroded, or damaged cartridge can lead to a burst cartridge case and consequent damage to the firearm and personal injury
from the sudden escape of high-pressure propellant gas within the firearm’s mechanism.
4. immediately stop shooting and check the barrel for a possible obstruction whenever:
• you have difficulty in, or feel unusual resistance in, chambering a cartridge;
• a cartridge misfires (does not go off);
• The mechanism fails to extract a fired cartridge case;
• unburned grains of propellant powder are discovered spilled in the mechanism;
• a shot sounds weak or abnormal. in such cases it is possible that a bullet is lodged part way down the barrel.
• firing a subsequent bullet into the obstructed barrel can wreck the firearm and cause serious injury to the shooter or to
bystanders.
5. Bullets can become lodged in the barrel:
• if the cartridge has been improperly loaded without propellant powder, or if the powder fails to ignite (ignition of the
cartridge primer alone will push the bullet out of the cartridge case, but usually does not generate sufficient energy to
expel the bullet completely from the barrel);
• if the bullet is not properly seated in the cartridge case, when such a cartridge is extracted from the chamber without
being fired, the bullet may be left behind in the bore at the point where the rifling begins. Subsequent chambering of
another cartridge may push the first bullet further into the bore.