Another M&P 1.0 9mm Question

A

AirForce85

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I have been shooting my M&P 1.0 9mm in competitions for a few years and have modified/upgraded it a fair bit. As of now it runs 124 gr NATO fairly well with an Apex trigger/spring/sear kit, Faxon match fluted barrel, Faxon compensator and 12lb recoil spring w/a stock striker spring. I've been trying to tune it where I can get it back to shooting Luger pressures without failures to fire. I typically get 3 or 4 per 23 round mag. I've read about people using a lighter or heaving striker spring to offset the lighter recoil spring, but have also read the opposite in Glock threads.

Would a lighter striker spring possibly resolve my issue? Or am I going the wrong direction?
 
Also, not trying to be cheap and shoot Luger over NATO but my follow-up shots are much faster with the lower pressure rounds.
 
Ruffinit said:
I'd honestly think to try a slightly heavier recoil spring first. Might be trying to cycle too fast.
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I did. Went back to a 14 lb spring and tried a stock and light weight striker spring. Majority of shots were light strikes with light weight striker spring. Switched by to stock striker spring and had 4 or 5 light strikes per 23 rd mag with CCI & Winchester primers. Going to try Federal primers next week and hope it fixes the light strike issue with the 14 lb recoil spring and stock striker spring. Also, all but one of the light strikes fired second time around.
 
AirForce85 said:
I did. Went back to a 14 lb spring and tried a stock and light weight striker spring. Majority of shots were light strikes with light weight striker spring. Switched by to stock striker spring and had 4 or 5 light strikes per 23 rd mag with CCI & Winchester primers. Going to try Federal primers next week and hope it fixes the light strike issue with the 14 lb recoil spring and stock striker spring. Also, all but one of the light strikes fired second time around.
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If you were reliloading, I'd say it sounds like a primer seating issue.

You aren't oiling the striker channel, are you?
 
All store bought and it runs fine all stock, but I'm trying to get it to run well with the longer barrel and compensator. And no I haven't been oiling it. I tore the slide down to the bare bones including striker channel sleeve and cleaned it all throughly and lightly lubed the slide per S&W guidance for the next attempt this coming week.
 
That would be a big help. I wish I had paid more attention to the casings after malfunctions before the last couple of range trips. I had settled with a 12 lb spring w/stock recoil with 124gr nato for a while, but then wanted to try to flatten out the recoil a little more by going back to luger so I tried the lighter striker spring with the 12 lb recoil hoping to balance out the reduction in spring weights. Found out that was giving me more light strikes than not so I went back to 14lb with stock stock (new) striker spring which ran fine from what I can recall with nato pressures, but gave me about a 15% light strike rate with luger.
 
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That is with Winchester, LAX ammo and some knock off brand ammo. I'm hoping the softer federal primers and a surgically clean striker channel will help.
 
Finally got to the range. Shot great with federal ammo. Had two malfunctions out of 100 and one of those was me limp wristing it and the other was a failure to reset. I can live with that.
 
I might eventually experiment with a heavier striker spring to see if I can get it to shoot anything.
 
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