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  #1  
Old 06-30-2015, 11:10 AM
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Default ILS Replacement and Main Spring Wieght ?? 9MM

I'm going to replace my mainsping housing with a S&A one piece, I've read that ILS comes with a 28# mainspring and to replace it with a 23# is this correct.


Springfield says to replace it with a 19# and that stock it comes with a 23#.....of course they should know, but just wondering what everyone else is running. I'll be using the stock Ti firing pin.

It's a 9mm LT.


Thx.
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Old 06-30-2015, 11:46 AM
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The 19 works fine with the oe firing pin spring.
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Old 06-30-2015, 11:48 AM
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Quote:
Originally Posted by 7 Sprig View Post
The 19 works fine with the oe firing pin spring.
THX.




So if I ever switch to a steel firing pin, drop a 23# in there?
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Old 06-30-2015, 12:02 PM
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If get light primer strikes then yes , may or may not. If going to experiment buy the calibration kits and get a variety.
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Old 06-30-2015, 2:55 PM
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are you talking main spring or recoil spring??
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Old 06-30-2015, 2:59 PM
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Quote:
Originally Posted by kcstott View Post
are you talking main spring or recoil spring??
Main spring.



I spoke with SACS and was told that the stock spring is 23# to put a 19# in there.

Ordered my S&A magwell and was told a 23# would work best that the stock ILS spring is a 28#.


Ordered it with the 23# wolf spring and cap/plunger installed. I could always swap it later.
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Old 06-30-2015, 5:45 PM
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17#'s will usually work fine in a stock gun. Lighter 15 or 16 maybe. Keep in mind that the main spring works with the recoil spring to control the slide. There's more to it than just light primer strikes.
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Old 06-30-2015, 6:01 PM
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I replaced my ils on my springfield 9mm range officer.
I used a 17 lb mainspring.
I also tuned my slide to work with 125 power factor 9mm ammo with a 10# recoil spring.
Used the stock firing pin spring
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Old 06-30-2015, 6:03 PM
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I'll try the 23# if I have any cycling issues I'll switch to a 19#.
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