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Thread: Not sure if I should ask this here or not.

  1. #1

    Not sure if I should ask this here or not.

    Recently I was reloading some factory(I know cast only) 9mm rounds.i didnt realize my seat depth had managed to move and I was sweating at 1.086 as opposed to the 1.169 my manual says I need to be at. Will the difference In 100 thousandths cause an issue pressure / safety wise?

  2. #2
    Boolit Master

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    It'll have some more pressure, but if you're not right up that at max. load, it shouldn't be some dangerous sort of deal.

    I'd shoot one, look for a pressure sign, and go from there.

    If you're not comfortable with that, run 'em through a kinetic puller
    to ease them out a little and re-seat to the specified length.
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  3. #3
    Boolit Master
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    i think the way he posted is that the bullets are seated at 1.086 which is not down to the 1.069 the manual says.....right?

    if that's the case he may have issues with the slide not going into full battery because of the overall length being too long.

    that's how i read the o.p.

  4. #4
    Boolit Master
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    That’s right at .080 thousands. What powder did u load with? It should be ok but if your at or close to max loads already in a 9mm it might be a little hot.

  5. #5
    what bullet and what load?

  6. #6
    Boolit Master


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    Unless you ran the exact bullet the manual used and ran it right out to the maximum, I would try one, assuming you are talking a quality 9mm. Overall length isn't what we actually need to know, it is how much farther in the case the bullet is compared to what the manual tested. Nose shapes can vary considerably. A pointier bullet might be in the case even less than the one tested, and pressure might be down.

  7. #7
    Quote Originally Posted by Jniedbalski View Post
    Thatís right at .080 thousands. What powder did u load with? It should be ok but if your at or close to max loads already in a 9mm it might be a little hot.
    I used winchester autocomp and I'm around the middle of the load data.

  8. #8
    It's supposed to be at 1.169 and I'm seated too deeply at 1.086

  9. #9
    Boolit Master
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    What do you mean by reloading factory rounds?

    Which bullet are we talking about? Be as specific as possible.

    How much powder? Unless you give the details of what happened we can only take wild guesses.

    Unless youíre using a round nose bullet youíll never get a 9mm load at 1.169. Many flat nose bullets are seated in the 1.06 to 1.10 range. Even most RN bullets donít go all the way out to 1.169.

  10. #10
    Boolit Master
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    ahhh ....you lost me at "sweating it" now i know you meant "seating it"

  11. #11
    Boolit Master

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    I did that once on 50 rounds. No problem as I used a kinetic puller to NOT dislodge bullet but bump it out a few thousandths. Only takes a whack or two. Went back and seated properly. Goes faster than you think.
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  12. #12
    Boolit Buddy Kent Fowler's Avatar
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    SAAMI standard specifications on 9mm OAL are:

    Min 1.095
    Max 1.169

    You were just a shade under minimum length

  13. #13
    Boolit Grand Master Outpost75's Avatar
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    With M882 9mm service ammunition cracking the Black Lucas sealant and seating bullets only 1mm deeper resulted in a pressure increase from 38,000 psi to 62,000 psi, exceeding proof pressure. The Speer manual contains similar warnings.

    I WOULD PULL THEM ALL!!!!
    The ENEMY is listening.
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  14. #14
    Boolit Man
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    My son, when he first started reloading, managed to get some 40 s&w loads about .060 short from his desired length. This happened because of lube build up in the seating die. He was using unique and loading at or near max. The result was interesting. It didn't destroy his 96 Beretta, but it did partially disassemble it. Needless to say the cart. case wasn't reusable.
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  15. #15
    Boolit Master Bazoo's Avatar
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    Pends in the gun whether or not I'd try to shoot them. If you're running them through a glock 17 or a Ruger p95, I'd shoot one and see how it felt. If you're running them through a hi power, I'd pull them with an enertia puller a bit and re seat them.

  16. #16
    Boolit Master Wheelguns 1961's Avatar
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    Quote Originally Posted by Outpost75 View Post
    With M882 9mm service ammunition cracking the Black Lucas sealant and seating bullets only 1mm deeper resulted in a pressure increase from 38,000 psi to 62,000 psi, exceeding proof pressure. The Speer manual contains similar warnings.

    I WOULD PULL THEM ALL!!!!
    This! Always better to be safe than sorry!
    Due to the price of primers, warning shots will no longer be given!

  17. #17
    Boolit Master
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    Put 'em back to spec, otherwise be considerate of others and don't shoot them when others are on the line. It's one thing to hurt yourself, but another thing to hurt others.

  18. #18
    Boolit Man
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    Quote Originally Posted by Outpost75 View Post
    With M882 9mm service ammunition cracking the Black Lucas sealant and seating bullets only 1mm deeper resulted in a pressure increase from 38,000 psi to 62,000 psi, exceeding proof pressure. The Speer manual contains similar warnings.

    I WOULD PULL THEM ALL!!!!
    Me too! The 9mm is a pretty high pressure cartridge, with not much room for powder. Things can go bad fast.
    Oklahoma. Quite possibly the reddest state in the U.S.A. 77 counties, 2 elections, and not a single one went for B.O. Uh make that 3 elections, we didn't care much for Hillary either.

  19. #19
    Boolit Master Burnt Fingers's Avatar
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    There's a warning in the current RCBS manual about 9mm. A 0.030 change in seating depth more than doubled pressure.

    I'd pull them.
    NRA Benefactor.

  20. #20
    Boolit Bub
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    You won't have an issue with the load. If they feed reliably your good to go

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check