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Old March 9, 2013, 09:47 PM   #7
MrBorland
Senior Member
 
Join Date: May 31, 2007
Location: NC
Posts: 2,614
S&W never designed the gun to be half-cocked, but in some guns, tolerances are such that it's possible to get it into a faux half-cock if everything's just so. It's not good for the gun, though, and even worse for it if you simply pull the trigger to get it out of half-cock. Just recock the hammer and start over. The pics below show what's going on inside.

Normal hammer start position:


Normal hammer lowering (3). A faux half cock can be achieved if the DA sear is a wee bit too long, in which case, the trigger nose gets jammed behind the DA sear as the hammer's lowered (4).


Faux half cock can also happen if the trigger cam rests on the SA sear. Compare close-ups of pics 2 & 5:


As you figured, hold the trigger fully rearward, or let it fully forward as you let the hammer down. In between is where trouble arises.
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