Author Topic: Mainspring Question  (Read 1724 times)

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Offline Spark Shooter

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Mainspring Question
« on: June 13, 2009, 12:39:57 PM »
My shadow is a stock canadian model. I've read through all the spring posts and I can't find a consistent answer for the Shadow stock spring. I can gather that the stock mainspring is ~18lbs, i had the trigger pull tested by a smith, and the SA averaged 3 lbs 11oz and the DA was higher than the scale would read (max 12 lbs digital scale). I'm assuming due to leveraging reduction I won't get a  1:1 reduction if I drop the mainspring to 15lbs, what is everyone getting trigger pull down to (without a trigger job), should I expect around an 8-9lb DA pull now? With the SA it shouldn't change too much due to the SA being predominantly affected by the sear? Thoughts?
SP01 Shadow

Offline Stuart

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Re: Mainspring Question
« Reply #1 on: June 13, 2009, 01:14:08 PM »
if you drop to a 15# to 13# mainspring. IIRC you will get it into the 8# range and the SA should drop to around 3# ( less pressure on the hammer pushing onto the sear.)  This is without doing any other polishing.

Offline Spark Shooter

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Re: Mainspring Question
« Reply #2 on: June 14, 2009, 09:03:29 AM »
So a 15 or a 13 lb spring would get me about 8 lbs DA and 3lb SA?
SP01 Shadow

Offline Canuck44

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Re: Mainspring Question
« Reply #3 on: June 14, 2009, 09:47:15 AM »
I changed mine out to a 13# spring.  DA pull is just over 5#s, just enough to get you past the IPSC 5# test for trigger pull.  I have had no problems with light hammer strikes using the 13# spring using Win, Fed, and CCI primers.  Remington primers seem to be harder, or the last batch I had were and don't use them anymore.

Take Care

Bob
Je Suis Charlie

Offline Spark Shooter

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Re: Mainspring Question
« Reply #4 on: June 14, 2009, 12:16:10 PM »
Thanks Bob, that's the answer I was looking for. I don't use Remington only CCI or Federal. I'll switch it out and run some through at practice this week to check reliability. Do you run an 11lb recoil spring as well?
SP01 Shadow