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AR15.COM
9/7/2010 3:17:45 PM EDT
After two years of shooting I finally had a light primer strike with a 9lb spring in my SP101.



IIRC the OE spring is 12lb and the Wolff kit comes with 10,9,8.



All firearms are react differently but this one is going to get the 10lb spring.
9/7/2010 4:09:37 PM EDT
[#1]
How many rounds did you shoot before the light strike?  Any more since?
9/8/2010 10:25:34 AM EDT
[#2]



Quoted:


How many rounds did you shoot before the light strike?  Any more since?


At least 500 had been through it before the light strike.  I sent it back through and it fired.  I CCW this gun so its gotta fire.



 
9/8/2010 10:27:05 AM EDT
[#3]
I put the lightest mainspring in mine and still haven't had any failures to fire...but I smoothed and greased the internals too.
9/8/2010 3:27:13 PM EDT
[#4]



Quoted:


I put the lightest mainspring in mine and still haven't had any failures to fire...but I smoothed and greased the internals too.


I have done the same.  I completely disassembled it and polished everything.