Lucreau Posted November 16, 2019 Share Posted November 16, 2019 (edited) On my limited gun I had half cock on a previous trigger, but not with a new SV trigger. Is the half cock feature needed? Edited November 16, 2019 by Lucreau Link to comment Share on other sites More sharing options...
Guy Neill Posted November 16, 2019 Share Posted November 16, 2019 If you feel there will never be anything that will bump the hammer off the sear, or slip when moving the hammer to cock, or uncock, it, then the half cock is likely not needed. On the other hand, if something does bump the hammer off the sear, or you slip manipulating the hammer, then the half cock may save an unwanted (and potentially dangerous) hole in something. In load development, I have had low powered loads that left the hammer on half cock. Without the half cock, would the gun have gone full auto? I don't know, but there is that potential if circumstances line up the right way. I have not had problems with the hammer or half cock, but I have no intention of eliminating the half cock. It's a safety we never want to need - like insurance. Link to comment Share on other sites More sharing options...
Jim Watson Posted November 16, 2019 Share Posted November 16, 2019 If all you did was change the trigger and the half cock quit working, you did something wrong. Link to comment Share on other sites More sharing options...
Lucreau Posted November 16, 2019 Author Share Posted November 16, 2019 25 minutes ago, Guy Neill said: If you feel there will never be anything that will bump the hammer off the sear, or slip when moving the hammer to cock, or uncock, it, then the half cock is likely not needed. On the other hand, if something does bump the hammer off the sear, or you slip manipulating the hammer, then the half cock may save an unwanted (and potentially dangerous) hole in something. In load development, I have had low powered loads that left the hammer on half cock. Without the half cock, would the gun have gone full auto? I don't know, but there is that potential if circumstances line up the right way. I have not had problems with the hammer or half cock, but I have no intention of eliminating the half cock. It's a safety we never want to need - like insurance. I appreciate the insight Link to comment Share on other sites More sharing options...
Lucreau Posted November 16, 2019 Author Share Posted November 16, 2019 10 minutes ago, Jim Watson said: If all you did was change the trigger and the half cock quit working, you did something wrong. Before with the sv trigger it had a good grip on half cock. Now with the other sv bow, it BARELY will touch the half cock and 9 out of 10 times not engage. Anything in particular I should look at? Link to comment Share on other sites More sharing options...
Jim Watson Posted November 16, 2019 Share Posted November 16, 2019 Sorry, I have not seen the defect in person and don't know just how the trigger might be misfit. But if it is grazing the half cock on the way down, it will eventually chip out the hammer or the sear. Link to comment Share on other sites More sharing options...
TONY BARONE Posted November 16, 2019 Share Posted November 16, 2019 The half cock has to work to have a safe gun. Getting it to work correctly requires some knowledge of the 1911. Link to comment Share on other sites More sharing options...
Lucreau Posted November 16, 2019 Author Share Posted November 16, 2019 I threw the old trigger back in, got a match tomorrow and don’t need a ND. Swapping the old trigger bow back in the half cock now engages fully again Link to comment Share on other sites More sharing options...
frgood Posted November 16, 2019 Share Posted November 16, 2019 52 minutes ago, TONY BARONE said: The half cock has to work to have a safe gun. Getting it to work correctly requires some knowledge of the 1911. Agreed! Any gun should to be used should operate in a correct and safe manner. period. [Yes, disabling the grip safety is specific to competition pistols. That is okay because the gunsmith and the user, are fully aware of the modification and the gun operates fully and safely otherwise.] Link to comment Share on other sites More sharing options...
zzt Posted November 16, 2019 Share Posted November 16, 2019 You need the half cock to work. That is checked at the chrono station. I believe your new trigger bow is a bit too long, or you set the pre-travel arms out too far. Did you get the tri-glide or the regular? The last time that happened to me with a new trigger, I left it in the gun, placed a punch on the rear of the bow and gave it a moderate tap. That pushed the rear of the bow towards the front of the gun and the half cock worked again. Link to comment Share on other sites More sharing options...
Lucreau Posted November 16, 2019 Author Share Posted November 16, 2019 1 hour ago, zzt said: You need the half cock to work. That is checked at the chrono station. I believe your new trigger bow is a bit too long, or you set the pre-travel arms out too far. Did you get the tri-glide or the regular? The last time that happened to me with a new trigger, I left it in the gun, placed a punch on the rear of the bow and gave it a moderate tap. That pushed the rear of the bow towards the front of the gun and the half cock worked again. Thanks for the response. That was my thought, was the length but wasn’t sure. And I got the regular bow. After tomorrow’s match I’m going to give that a try with a punch. Thanks again! Link to comment Share on other sites More sharing options...
Lucreau Posted November 17, 2019 Author Share Posted November 17, 2019 4 hours ago, zzt said: You need the half cock to work. That is checked at the chrono station. I believe your new trigger bow is a bit too long, or you set the pre-travel arms out too far. Did you get the tri-glide or the regular? The last time that happened to me with a new trigger, I left it in the gun, placed a punch on the rear of the bow and gave it a moderate tap. That pushed the rear of the bow towards the front of the gun and the half cock worked again. So I shortened the new bow, half cock works and engages. BUT when it’s at half cock and I squeeze the trigger the hammer falls. Is that checked at chrono, or just that the hammer catches on halfcock? Link to comment Share on other sites More sharing options...
zzt Posted November 17, 2019 Share Posted November 17, 2019 9 hours ago, Lucreau said: Is that checked at chrono Every thing is checked at chrono, and they are not gentle about it. If any safety feature fails, the gun is out. Link to comment Share on other sites More sharing options...
Jim Watson Posted November 17, 2019 Share Posted November 17, 2019 12 hours ago, Lucreau said: BUT when it’s at half cock and I squeeze the trigger the hammer falls Possibility 1. You have a hammer with "safety stop" like a Colt Series 80. That is normal behavior. Possibility 2. You bent the trigger just enough to allow a "false half cock" with the sear on the lip of the notch, not captive in the undercut. Dangerous in the extreme, probably worse than no half cock. Link to comment Share on other sites More sharing options...
shred Posted November 17, 2019 Share Posted November 17, 2019 Plus if you ever go to an IPSC match, the gun check usually tests the half-cock works too. https://ipscalberta.com/uploads/documents/IPSC Handgun Equipment Check Handbook - Jan 2019 edition.pdf Link to comment Share on other sites More sharing options...
HOGRIDER Posted November 18, 2019 Share Posted November 18, 2019 On 11/16/2019 at 11:08 AM, Lucreau said: On my limited gun I had half cock on a previous trigger, but not with a new SV trigger. Is the half cock feature needed? I've never installed an SV trigger........but it being a premium piece, I think it would have an overtravel adjustment screw that can prevent half-cock if adjusted in too far. Have you tried backing the screw out with the new bow? Link to comment Share on other sites More sharing options...
Lucreau Posted November 18, 2019 Author Share Posted November 18, 2019 FIXED. The new bow was slightly longer than the other. Couple of light taps on the rear of the bow with it installed and now the half cock works, and doesn’t drop with the trigger Link to comment Share on other sites More sharing options...
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