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Best bullet weight for 9mm

Discussion in 'Reloading' started by Ricky baby, Mar 10, 2017.

  1. Ricky baby

    Ricky baby

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    I have been trying 115, 124 and 147gr FMJ in my Glock 34 and can't decide which is best. I'm not a speed freek in fact, quite the opposite. I'm looking for soft recoil, low velocity, very low power factor below 125 in order to handle the gun better and consistent.
     
  2. DWARREN123

    DWARREN123 Grumpy Old Guy Silver Member

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    For what you want I would go with 147gr bullets.
    I like 124/125gr for all around use.
     
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  3. SJ 40

    SJ 40 Deplorable,Clinger

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    Given your parameters I second D Warren's recommendations and is my choice also. SJ 40
     
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  4. Ricky baby

    Ricky baby

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    So, 115 is useless and I should give it up?
     
  5. DWARREN123

    DWARREN123 Grumpy Old Guy Silver Member

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    No but you will have to push it harder to get what you want and the felt recoil would probably be greater.
     
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  6. JohnnyJ

    JohnnyJ God, Family and Friends

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    My wife shoots 147gr HST JHP. I shoot 124gr HST JHP. Her Glock 26 my Glock 19
     
  7. usnret

    usnret

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    You want a 160gr Bayou Bullet.
     
  8. Ricky baby

    Ricky baby

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    Why do you say 160gr Usnret? Where do you get load data on 160
     
  9. Ricky baby

    Ricky baby

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    How does that work? I know lower weight/more powder/higher velocity and potentially lower power factor. What am I missing. For example: 115 gr FMJ with titegroup 3.5gr = velocity of roughly 951fps, 109 power factor. 147gr FMJ with titegroup 3.2 = velocity roughly 855, power factor 125. I guess my question is what does power factor mean. Isn't power factor the measure of recoil impulse from the firearm onto the shooter? or is their more to it?
     
  10. fredj338

    fredj338

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    You have to get the slide to run. This requires more bullet mass or higher vel. Heavier bullets making min pf offers softer recoil, a lot in the diff between 115gr & 147gr. My theory is torque.
    A 115gr @ 1200fps offers a lot more torque than a 147gr @ 825fps. 375fps x the twist rate is a lot more rpm, more twist, higher felt recoil. A 147gr only seems to move the slide reward, not twist the gun out of your grip. The 160-165gr is even softer, but i dont like the way it feels. Slide speed seems sluggish, like i am waiting on it to trigger my next shot.
    Sure a lighter bullet going slower offers less recoil, but the gun wont run or you dont make pf. That is just physics.
     
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  11. fredj338

    fredj338

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    Only thing 115gr offers you is cheaper shooting.
     
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  12. usnret

    usnret

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    I run the 160 gr bullet in my limited guns and in my PCC. there is a whole lot less muzzle flip and felt recoil. I had to get the reloading data from Western Powders via E-mail. I push the bullet at 900fps out of the handgun and 985fps out of the PCC.
    In my conversations with Hodgdon, they claim that you can't shoot a 160gr bullet out of a 9mm. I suggested that they take a look over on the Enos forum.
     
  13. usnret

    usnret

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    Power factor is a value that various organizations have put in place to kind of help level the playing field for the gamers. There is a difference in hit values between Major and minor power factor. The minimum for minor is 126, and the minimum for major is 165. These are the values that USPSA uses. Steel Challenge just require a minimum of 126.
     
  14. fredj338

    fredj338

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    Makes you wonder about the wisdom of "experts". I know dozens of guys shooting 160-165gr in their 9mm. There are even factory loads, so what is wrong with the "experts"? I've given up on them for 9mm minor but I could see them in 9mm major, but you are pushing them really hard in the small case.
     
    Last edited: Mar 10, 2017
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  15. usnret

    usnret

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    I don't know if I would even try to do a major load with them. I do run a major load with a 124gr bullet and Auto-Comp for my open gun.
    I have had some other rather interesting conversation e-mails with Hodgdon regarding Longshot powder. I use it in my 10mm for a 180gr bullet. I asked them about loads for a 165, and 155 gr bullet. They came back with "our engineers think that it is too slow for that size of bullet". But they have load data in 40S&W for those weights. they also have data for 9mm 115s, 124s, and 147s. I have pretty much given up on them for any load data help, cause some of their answers just don't make much sense.
     
  16. Ricky baby

    Ricky baby

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    This is why you get paid the big bucks! I never thought of torque as a factor. You have the experience I can't get from the books. I appreciate your response. Question answered.
     
  17. fredj338

    fredj338

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    It is just my theory, but I am sure some math wiz can do the numbers. 130PF is identical with 115gr @ 1130fps vs 147gr @ 880fps. So that is what, 250fps more vel x twist rate = rpm?
    Various recoil calculators only take into account the basic mass x vel / gun wt. This is probably close enough for rifles, but handguns, I think torque plays a roll in felt recoil.
     
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  18. TheDreadnought

    TheDreadnought

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    Yes. 124 is the way to go.
     
  19. fredj338

    fredj338

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    Depends.:drunk:
     
  20. DWARREN123

    DWARREN123 Grumpy Old Guy Silver Member

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    Just try out 10 or 20 of each weight at the PF you need and see for yourself which you like.
     
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