half cock

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half cock

n.
The position of the hammer of a firearm when it is raised halfway and locked by a catch so that the trigger cannot be pulled.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

half′ cock′


n.
(on a firearm) the position of the hammer when held by the sear halfway between the firing and retracted positions so that the weapon cannot be fired.
[1695–1705]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Mentioned in
References in periodicals archive
The ploughman was in the act of lowering the hammer of the weapon to 'half cock' but pressed the wrong trigger 'with the terrible result that the charge of a barrel was lodged in the hip of Donald, who was about 10 yards from the gun'.
It was notable for being one of the few military revolvers with a safety lever, which could be placed in the Safe position when the hammer was at half cock.
The rifles are put on half cock during this procedure for safety.
Up to this point, to load or unload a single-action sixgun meant the loading gate was opened, the hammer placed on half cock and the cylinder rotated for loading and unloading.
Single-action sixguns with the traditional half-cock notch will often lock up if the hammer is allowed to go forward from the half cock. This can also cause cylinder "ringing" which is the inscribed line around a cylinder through the bolt notches.
I could have wished for a more organised presentation (taped music which went off at half cock - odd arrangements on the reading platform, and so on) but David Burke and Jessica Turner coped well enough.
Humour in this kind of book is not always appreciated, especially if it goes off at half cock. The book tries to be cute and funny while packing the information.
Today's Bearcat is all stainless steel with a transfer bar safety, while still maintaining the half cock position for loading and unloading.
After making certain that the chamber is empty, all live ammo is elsewhere, and with the barrel pointed in a safe direction, close the action, pull the hammer back to half cock, and open the lever.
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