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9mm OAL Question

Discussion in 'Reloading' started by Uboofer, Mar 16, 2017.

  1. Uboofer

    Uboofer

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    Just out of curiosity, what is everyone setting their OAL to for round nose bullets?

    I have been getting some FTFs in my G34 and wonder if it's the plated bullets or my OAL. I'm not sure what brand the bullets are as I bought them a while ago at my local GS and it didn't have a label. I still have a bunch of them so just dumping them is not a option. Right now I am using a 124gr plated RN bullet with 4.0 grains of TG with a OAL of 1.150 and a crimp of .378

    When the G34 has a FTF, all I need to do is pull the slide back ever so slightly and the round pops out of the magazine and right into the chamber. I'll try to get a picture next time it happens so you can see it.

    The same rounds function flawlessly in my Springfield RO so whatever the issue is it only happens to the Glock.
     
    Last edited: Mar 16, 2017
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  2. A6Gator

    A6Gator

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    I've loaded 1000's of Precision Delta 124gr fmj's, using 4.0gr Titegroup at 1.15. Works like a champ in STI, Glocks and Sigs.

    Does it happen will all your Glock mags? My experience is that Glock mags are like Glocks, reliable as a hammer, but you might have one with some goofy lip spread.
     
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  3. Uboofer

    Uboofer

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    Tried different mags and still does it. It's not all the time but probably 2-4 times per outing. I'm not competing so it's more annoying than anything.

    I was comparing these bullets with a new box of 1k bullets and it's possible that the bullet manufacturer may be CMJ but not 100% positive. The profile and demensions are the same.
     
  4. ChrisJn

    ChrisJn "Old Bill"

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    I have loaded many thousands of Berrys, Extreme, and Precision Delta 124gr RN, 5.5gr Accurate#5, at 1.135. No problems so far.
     
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  5. fredj338

    fredj338

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    Oal is ALWAYS gun & bullet specific. Most 124-147gr RN can be loaded out to 1.150" & work fine, but every gun is diff. Try shortening to 1.140", see if that runs better.
     
    Last edited: Mar 17, 2017
  6. tjpet

    tjpet

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    1.150 approx. Runs fine in a variety of gun brands.
     
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  7. glockem2014

    glockem2014

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    I have always stayed with the standard OAL of 1.150" with my loads. Although I use the 124 gr. Hornady FMJ with a rather hefty charge of HS-6. So far...no problems with it. Good luck & let me know.
     
  8. refugeepj

    refugeepj

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    for 9mm, i check the listed minimum OAL listed in my data for the specific bullet and powder, and load at least twenty five thousandths over that.
    in general, i am between 1.125 and 1.150, depending on powder and charge. 1.125 would be my minimum.
    shorter with a faster powder, usually 1.130 to 1,135. longer with a slower powder, usually 1.135 to 1.150.
    i just finished some 124 plated at 1.140 and mid range Longshot for a charge.
     
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  9. fredj338

    fredj338

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    OAL is more about proper functioning in your pistol than anything else. So I pretty much ignore the book, load as long as will fit in my gun's chamber & the magazine all the way down. As long as you are not loading max loads, the OAL isn't moving the pressure needle much.
     
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  10. sciolist

    sciolist

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    1.145ish in all my Glocks, including 9 gen3 G34's. 1.50 seems to be the safe max in terms of feeding in the mag. I've never seen a reason to go lower, although I did start out at 1.135.
     
  11. oldengineer

    oldengineer

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    I load 115 RNs at 1.135 with 4.3 gr Titegroup and have no problems. I measured some 115 WWBs and they're up around 1.16.
     
  12. dudel

    dudel

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    This simple guide works for setting pistol headspace. Set longest OAL that gives you the two middle picture (and work in your magazine).
    upload_2017-3-20_8-6-1.png
     
  13. droptrd

    droptrd

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    I'm very similar to you. 4.1 titegroup under 124gr xtreme @ 1.147". I can't remember the last time I had feed issues at that length.
     
  14. Uncle Don

    Uncle Don Wood butcher

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    With moderate, or slightly higher loads; if they fit in the mag without issue, the'll work in the gun. Sounds simplified, but with 124s, I set them (by eye) to very slightly show the full diameter above the case top.
     
  15. fredj338

    fredj338

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    Yes & no UD. Sharp shouldered trunc cone bullets tend to load shorter, easily fit the mag but may hit rifling at even something like 1.125".
     
  16. Uncle Don

    Uncle Don Wood butcher

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    They can't get much deeper in the case - what they are, they are. After 10s of thousands, I haven't had an issue so I'm not going to sweat it. So far, I've never measured the OAL nor had lead issues in the bore. Guess it just worked out.
     
  17. tommyherman

    tommyherman

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    I use xtreme 124gr Copper RN, with 4.4 gr of Bullseye (loads similar to Titegroup), COL 1.150 shoots Great in my G19 and G34.
     
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  18. fredj338

    fredj338

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    The issue is the dozens of diff bullet designs & weights. All require slightly diff OAL for best results. As noted, I can load a 124gr TC to a very short 1.120" & it won't chamber in some guns, requiring me to go to something like 1.100". Most mags will take the saami max length of 1.169" all the way down with most bullet designs.
     
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  19. 9x45

    9x45 Millennium Member

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    I've run 124 grain 9mms from 1.060" to 1.175" All depends on the bullet shape. 4 grains of TG is plenty of juice. Check your recoil spring.

    [​IMG]

    [​IMG]
     
  20. T Hutch

    T Hutch

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    I run COAL of 1.150 with 124 grain round nose, with a .376 crimp. When I was using Tite group I used 3.9 grains and never had a issue with that set up in a variety of Glocks and other 9mm pistols.
     
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