Cy Soto Posted March 24, 2009 Share Posted March 24, 2009 Is anyone here using (or have used) an 11lb recoil spring in an M&P40 (shooting minor loads)? I know that most shooters will recommend using a 13lb spring for this application but I am curious to know if there is any reason why you wouldn't go lighter. Link to comment Share on other sites More sharing options...
Sarge Posted March 24, 2009 Share Posted March 24, 2009 Cy, trust me I am no expert by a long way. But I have seen posts concerning going too light and causing a lot of beating up of the gun parts. Also I have seen talk of the gun coming out of battery with too light of a spring causing a FTF. I am sure you will get some replies along those lines. Link to comment Share on other sites More sharing options...
G-ManBart Posted March 24, 2009 Share Posted March 24, 2009 Another consideration is feeding reliability. Assuming you're still getting full slide travel and solid ejection a heavier spring will feed more reliably. R, Link to comment Share on other sites More sharing options...
hanexp Posted March 26, 2009 Share Posted March 26, 2009 I think there could be a concern about the gun unlocking prematurely enabling a FTE. I would think that way because I am having FTE, but I sure would try it and see. Or, I would encourage you to try it and see how you do. Link to comment Share on other sites More sharing options...
coyote9090 Posted March 30, 2009 Share Posted March 30, 2009 Just out of curiosity I went out yesterday and tried an 11#. Out of 6 rounds fired two failed to go completely into battery causing a very light and slightly off center striker ding. I re chambered the rounds and they fired after ensuring the slide was completely forward. Another note the gun seemed to flip slightly more than the 13# spring, I'm assuming because the spring is to light and the slide is hitting. I stopped there and installed the 13# WAY better... the gun returns better and to point of aim faster than the 11# or the original. hope that helps Link to comment Share on other sites More sharing options...
Cy Soto Posted March 30, 2009 Author Share Posted March 30, 2009 Coyote, Out of curiosity, did you try this with a 9mm or .40S&W? Thanks! Link to comment Share on other sites More sharing options...
coyote9090 Posted March 30, 2009 Share Posted March 30, 2009 40.... I currently own 2 40's, the 45 I used last year for lim 10, and a 9L Link to comment Share on other sites More sharing options...
ChrisStock Posted March 30, 2009 Share Posted March 30, 2009 I am running the 11# in mine for minor loads, and have been for over a year without a single issue. When shooting major, I go back to the 15#. The felt recoil impulse is noticeably different between the two. I have put approximately 9K of major and minor loads through this pistol and am pretty sure I have the kinks worked out. . Link to comment Share on other sites More sharing options...
Morgan Posted April 3, 2009 Share Posted April 3, 2009 (edited) Cy - I did a bunch of testing with tungsten and stainless guide rods and different spring weights, and settled on the 13# with a stainless rod (M&P9). The 11# took longer to settle after shots (the muzzle "bouncing", if you know what I mean). I thought the 11# would be better (running a 10# in my Limited gun), but the 13# was definitely faster and more controllable (Bill drills). -Morgan FY51526 Edited April 3, 2009 by Morgan Link to comment Share on other sites More sharing options...
Alfie Posted April 3, 2009 Share Posted April 3, 2009 Cy - I did a bunch of testing with tungsten and stainless guide rods and different spring weights, and settled on the 13# with a stainless rod (M&P9). The 11# took longer to settle after shots (the muzzle "bouncing", if you know what I mean).I thought the 11# would be better (running a 10# in my Limited gun), but the 13# was definitely faster and more controllable (Bill drills). -Morgan FY51526 Morgan, Which tungsten rod where you using? Link to comment Share on other sites More sharing options...
Cy Soto Posted April 4, 2009 Author Share Posted April 4, 2009 Cy - I did a bunch of testing with tungsten and stainless guide rods and different spring weights, and settled on the 13# with a stainless rod (M&P9). The 11# took longer to settle after shots (the muzzle "bouncing", if you know what I mean).I thought the 11# would be better (running a 10# in my Limited gun), but the 13# was definitely faster and more controllable (Bill drills). -Morgan FY51526 After waiting, for what seem like an eternity, for primers to arrive in the mail and receiving them yesterday afternoon, I put together some 40 minor loads and took the M&P to the range to try them out. I ran them with the factory recoil spring and I also tried the 11# and the 13# with a steel guide rod . I agree with you 100% that the best spring for the job is the 13#. The 15# factory spring works fine (even locking the slide back after the last shot) but it feels as if it's tracking in slow motion. The 11# was faster but, once again you explained it well, the front sight does a little wobble when it returns. I did not notice much of a difference in the feel of the recoil impulse between the 11# and 13# springs at 135PF (which turned out to be the load I liked the most). Link to comment Share on other sites More sharing options...
Morgan Posted April 4, 2009 Share Posted April 4, 2009 Alfie - I was using Speed Shooter Specialties tungsten and steel guide rod, and ISMI springs. I now have a tungsten guide rod for sale, cheap . Link to comment Share on other sites More sharing options...
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