Editing Cooking off (section)

=== Closed bolt ===
Most modern infantry [[assault rifle]]s fire from a [[closed bolt]], meaning that when ready to fire, there is a round in the chamber of the barrel and the bolt and working parts are in the forward position, closing the [[breech-loading weapon|breech]]. Squeezing the trigger releases the [[firing pin|striker or hammer]], firing the cartridge in the chamber. Assuming proper operation (no stoppages) a cook off is possible with this design because a cartridge is kept chambered in the potentially hot chamber, where it can absorb enough heat to cause ignition of its propellant.<ref>{{cite web |url=http://www.coltcanada.com/techpubs.htm |work=Colt Canada |title=OPERATORS INSTRUCTIONS C7 FAMILY OF COMBAT WEAPONS |page=7 |quote=The C7 family of weapons can fire the entire combat load of 150 rounds at any rate of fire without danger of cookoff. |archive-url=https://web.archive.org/web/20110708175626/http://www.coltcanada.com/techpubs.htm |archive-date=July 8, 2011 |url-status=dead }}</ref> Apart from the possibility to cook off the heated propellant requires a special formula to allow for consistent muzzle velocity throughout all temperatures.