TomMcC Posted September 25, 2012 Share Posted September 25, 2012 My M & P 9mm is a touch sensitive to certain primers (using Fed now no problems). Has anyone tried something like a Wolff extra power Glock spring (6lbs)? Did it make any difference? Link to comment Share on other sites More sharing options...
ProGunGuy Posted September 25, 2012 Share Posted September 25, 2012 i had some primer problems and bought a couple of them off of speed shooters and so far they work. they are only $4 i think Link to comment Share on other sites More sharing options...
High Lord Gomer Posted September 25, 2012 Share Posted September 25, 2012 I use them in all of my M&Ps. Light strikes in most of them before, none after. http://www.speedshooterspecialties.com/index.php?main_page=product_info&cPath=0&products_id=1022 Link to comment Share on other sites More sharing options...
TomMcC Posted September 25, 2012 Author Share Posted September 25, 2012 Thanks guys. I'll look into the recommended springs from SS. Link to comment Share on other sites More sharing options...
FightFireJay Posted September 26, 2012 Share Posted September 26, 2012 I have the striker spring from Apex tactical that came in my competition spring kit and haven't had any issues... But so far I have only fired Remington primers through it. Is this a common issue? Link to comment Share on other sites More sharing options...
High Lord Gomer Posted September 26, 2012 Share Posted September 26, 2012 I have had it happen with 3 or 4 of the 8 M&Ps I've owned. The 45, the 9 compact, and one of the 40 FS guns I didn't have for too long but it has happened to most of the 5 that I have shot a fair bit. Link to comment Share on other sites More sharing options...
Matt1911 Posted September 27, 2012 Share Posted September 27, 2012 Winchester primers are notorious for being harder primers and lots of people try to run white box and end up having light strikes. Switch to federal or CCI and those problems should go away. Link to comment Share on other sites More sharing options...
ryan45kim Posted September 27, 2012 Share Posted September 27, 2012 CCI primers are harder then winchester Link to comment Share on other sites More sharing options...
KennyWiz Posted September 28, 2012 Share Posted September 28, 2012 I have the striker spring from Apex tactical that came in my competition spring kit and haven't had any issues... But so far I have only fired Remington primers through it. Is this a common issue? I use a lot of WWB and have not had issues since I installed the above kit. I had a few soft primer hits with the factory kit. Link to comment Share on other sites More sharing options...
Matt1911 Posted September 28, 2012 Share Posted September 28, 2012 CCI primers are harder then winchester Really?!? I guess I've been lucky with them so far. The past 2k rounds I loaded with CCI's have run flawlessly, winchesters on the other hand give me a light strike about 1 out of every 10 rounds. Link to comment Share on other sites More sharing options...
ryan45kim Posted September 28, 2012 Share Posted September 28, 2012 I would rank the hardness of CCI small pistol primers between Winchester small pistol and Winchester small rifle. I feel Winchester and CCI are pretty close but the Winchester is definitely softer. If you are getting light hits with the Winchesters you might want to make sure they are fully seated. Link to comment Share on other sites More sharing options...
Jhp147 Posted October 3, 2012 Share Posted October 3, 2012 Does the heavier striker spring make a difference pull weight that can be measured? Link to comment Share on other sites More sharing options...
Quack Posted October 4, 2012 Share Posted October 4, 2012 Does the heavier striker spring make a difference pull weight that can be measured? Not as much as it would in a Glock. It would also have less of a difference if you are using an Apex sear. Sent from my ADR6425LVW using Tapatalk 2 Link to comment Share on other sites More sharing options...
toddje Posted February 6, 2014 Share Posted February 6, 2014 Resurrecting this thread, please... So if I understand this right, a 6# Glock striker spring is a reliable replacement for an aged M&P45 striker spring? That would be very helpful, since it's apparenlty not a part I can get anywehre but S&W factory... Does anyone have some 'long term' testing/experience with this setup (6# glock striker in MP45) that they can relate? Do I need to plan on swapping out the spring more often, for example? Link to comment Share on other sites More sharing options...
horseman Posted February 7, 2014 Share Posted February 7, 2014 What cured my light strike problems with ANY primers was a new striker assembly from SSS. Changed springs several times, nothing worked. Slapped in a new striker and my 2 year old journey of fail ended. Link to comment Share on other sites More sharing options...
toddje Posted February 8, 2014 Share Posted February 8, 2014 Well, I broke down and ordered the whole assembly as you suggested. I hope someone starts making the right spring soon... Link to comment Share on other sites More sharing options...
toddje Posted February 10, 2014 Share Posted February 10, 2014 Well, I broke down and ordered the whole assembly as you suggested. I hope someone starts making the right spring soon... OK thanks. I got my assembly from them on Saturday. Kind of an expensive fix, but if it works, it's worth it. Link to comment Share on other sites More sharing options...
e5gator Posted January 12, 2016 Share Posted January 12, 2016 (edited) i put in a glock extra power striker spring in my M&P 9 pro and it works great Edited January 12, 2016 by e5gator Link to comment Share on other sites More sharing options...
PiratePast40 Posted January 18, 2016 Share Posted January 18, 2016 I'm starting to get a few light strikes on S&B primers. Will get one every 3-4 hundred or so. I also have the Apex CAEK with the reduced power striker spring. Have around 6-7k rounds with the kit installed. Maybe time to replace all the springs, or just go back to the stock striker spring? is there a ballpark round count for when to change out all springs? Link to comment Share on other sites More sharing options...
Yibomb Posted January 21, 2016 Share Posted January 21, 2016 i just got the light powered striker spring from SSS and shot about 70 rounds of Freedom Munitions Blaster 9MM and had about 4-5 light strikes. Put my stock on back in and no light strikes. Link to comment Share on other sites More sharing options...
daytona955i Posted January 22, 2016 Share Posted January 22, 2016 I got to around 14-15k rounds on my original striker before it started to go t-up on me. I tried heavier springs and it was mostly reliable, but a new striker with the stock spring cured everything. That's with CCI primers. Federal primers would probably be okay with a 4.5lb or 4lb spring. I'd rather use a different TRS and have a heavier striker spring for reliability. Link to comment Share on other sites More sharing options...
mwx40x40 Posted October 22, 2016 Share Posted October 22, 2016 SSS has been out of extra power m&p strker springs for months, is there another source for these anywhere else? Or as some have mentioned here, just get 6# Glock Spring? Link to comment Share on other sites More sharing options...
M1A4ME Posted October 23, 2016 Share Posted October 23, 2016 The Glock spring will fit and it works fine if that's what's causing your problem. Mine was being caused by something else, at the time, so I still had issues till I got the timing issue fixed (striker block not completely out of the way when the sear released the striker). I did a pencil test comparison of the S&W spring vs. the Glock spring and the Glock spring did seem a bit stouter. Link to comment Share on other sites More sharing options...
MemphisMechanic Posted October 25, 2016 Share Posted October 25, 2016 (edited) How many of you have tested the ammo you're using for plunk AND spin before condemning the primers or striker spring as the issue? M&Ps have rather short chambers. Many bullet profiles loaded to typical lengths like 1.125" will actually be in the rifling, and not clear of it. Part of your striker force will be 'stolen' driving the bullet into the rifling until the case rim hits the bottom of the chamber, where it was supposed to be in the first place. Plunk = drop round into barrel after field stripping. It needs to fall in all the way, freely. spin = It should sling freely with your fingertips, showing that the bullet isn't engaging the rifling. Once I reamed the APEX barrel in my gun to accept the fattest profile bullets all the way out to 1.150"... even with a reduced power striker spring it will set off anything I load that is below flush. Even CCI Magnum primers. The gun is no longer picky at all. With a beautifully short 2.75lb trigger pull, too: Edited October 25, 2016 by MemphisMechanic Link to comment Share on other sites More sharing options...
MemphisMechanic Posted October 25, 2016 Share Posted October 25, 2016 Had to resize image to upload. Link to comment Share on other sites More sharing options...
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