Babaganoosh Posted March 20, 2012 Share Posted March 20, 2012 My Tungsten guide rod and recoil springs came in the mail today from SSS. I got a 15 pound and also a 13 pounder. The 15 pound one should be good to go, but if I install the 13 pound spring should I also be installing a lighter striker spring? I don't have much experience in messing with springs so not sure if I should or not. This is for a M&P pro in 40 that I shoot Limited with. 180 grain boolits. Link to comment Share on other sites More sharing options...
Noximus03 Posted March 20, 2012 Share Posted March 20, 2012 Theres no better teacher than trying and failure. Give the 13# spring a shot. worst case you get light strikes and either change ammo, or change springs. good luck. J Link to comment Share on other sites More sharing options...
Babaganoosh Posted March 20, 2012 Author Share Posted March 20, 2012 Side note. I only use Federal primers. Link to comment Share on other sites More sharing options...
twodelta Posted March 21, 2012 Share Posted March 21, 2012 I use a 40 Pro for Limited, and run a 13# spring for major and minor. I also use the stock striker spring. I don't use Federal primers, and I've never had any issues. Link to comment Share on other sites More sharing options...
nathandewalt Posted March 22, 2012 Share Posted March 22, 2012 I run 160 grain round nose bullets for bunny fart loads with a 11 lb and have never had any of the anove problems. Link to comment Share on other sites More sharing options...
Babaganoosh Posted March 22, 2012 Author Share Posted March 22, 2012 Update. I installed the guide rod and 15 pound spring first. It wouldn't hold open after the last round. I figured the 13 pound would really cause issues but tried it anyway. All I have to say is holy shit. It's like a different gun. It shoots so much better. I swear my groupings got tighter. The muzzle flip with major ammo is drastically reduced. It tracks better and feels more balanced when you insert a mag. I could only imagine how well it will shoot with minor ammo at steel matches. Not sure why the slide won't lock back with a 15 pound spring but will with a 13 pound one. Link to comment Share on other sites More sharing options...
JonF Posted March 23, 2012 Share Posted March 23, 2012 I think it becomes a timing issue, or more specifically, a "dwell" timing issue. With the heavier spring, the slide still goes back far enough to strip off fresh rounds, but it does stay back in this position for long enough of a duration to allow the follower to rise up and trigger the slide stop before its reversing course and returning to battery. With the lighter spring theres less overall resistance so it goes back either farther and/or for a longer duration so the time spent past the intermediate slide lock position is greater. I believe that you can see further proof of this in the recoil reduction since the spring is soaking up more of the energy thereby imparting less on the frame and your hand. Link to comment Share on other sites More sharing options...
JonF Posted March 23, 2012 Share Posted March 23, 2012 BTw, whats the stock spring weight? Link to comment Share on other sites More sharing options...
ryan45kim Posted March 23, 2012 Share Posted March 23, 2012 stock spring is 16lb Link to comment Share on other sites More sharing options...
Babaganoosh Posted March 24, 2012 Author Share Posted March 24, 2012 stock spring is 16lb Yup, which doesn't explain why a 15 pound spring won't lock back the slide but a 16 and a 13 will. I don't get it Link to comment Share on other sites More sharing options...
frontpage Posted March 24, 2012 Share Posted March 24, 2012 Where has these springs in stock. Every where i check outofstock Link to comment Share on other sites More sharing options...
Babaganoosh Posted March 24, 2012 Author Share Posted March 24, 2012 I got mine from Speed Shooter Specialties Link to comment Share on other sites More sharing options...
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