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Like many have reported with their own guns, my full size M&P9 is feeble at throwing brass and was pelting me with casings every fourth round. Several suggested that the 115gr. UMC I use at the range 99% of the time was a light load and partly responsible for the problem. Well, it's not cost effective to shoot 124 or 147gr. FMJ if you can even find it, so I plunked down the $33 (shipped) for a stainless guide rod and 11# recoil spring from Speed Shooter Specialties, who btw provides prompt turnaround and very good service. Installed both items and sent 150 of the same rounds down-range. 8) While it didn't totally cure the problem or turn the gun into a mad flinger of brass, the casings were at least kicking clear of me and reduced the problem to getting hit with a casing every 35-50 rounds. That's a much more tolerable frequency, so I'll use this setup at the range from now on. I was a little concerned that the lighter spring has a noticeable pause before the slide goes all the way into battery. It always goes bang, no failures. There's just a slight hesitation. I'm curious if splitting the difference and going with a 13# will result in a more-positive snap into battery and still throw brass clear. I guess for a mere $9 plus shipping, I can find out, huh? :wink:
 

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coltman1985 said:
Should have bought the 3 pack and saved some $~!!


+10 :wink:



IMO one spring change doesn't afford enough options to tune the weapon to your liking. Too many variable factors play into your subjective thoughts on what you/the weapon really likes. Again just my opinion but how it ejects brass is probably the lowest priority on my list - as long as the brass is ejecting and there are no FTF issues. Accuracy and cadence would be at the top.



Spring changes with factory ammo can become questionable vs. reloading your ammo. The reloaded ammo goes allows you to hone in on a preferred spring rate only because of the consistency of the round you control production of. You have no input at all in factory ammo. If running factory ammo through your weapon the stock spring should suffice.



My daughter-in-law shoots a Glock in competition. Your brass ejection issues can't be worse than one she experienced while shooting this summer....a hot spent round right between the boobs!
I was proud of her - she finished the stage then let off with a host of God awful language as she went digging for that piece of brass.
 

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Well.. I tried a similar thing for similar reasons. I decided to go back to the factory recoil spring as with anything less- the slide on occasion would not lock.
 

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Mine did that at first but it eventually broke in and throws them far enough. Either that or my hand loads are hotter than factory ammo...



Jon
 
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