6mm creedmoor seating depth

Discussion in 'Reloading Forum (All Calibers)' started by Chrissb18, Jan 29, 2019.

  1. Chrissb18

    Chrissb18

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    I recently purchased an american predator in 6mm....ran 100 rounds through it and didn't really realize the bolt being tight to close on factory 108gn hornday eldx. Upon ejecting a loaded round I'm getting rifling marks between the ogive and the case mouth bout 1/4 inch long. Is it jammed that far into rifling? I sent it to ruger as I would like to be able to shoot these and have talked to a few people with a similar problem that ruger fixed https://ibb.co/JK2X8hN https://ibb.co/pw3NkpJ https://ibb.co/NZgy7mx
     
  2. bigstick6017555

    bigstick6017555 Silver $$ Contributor

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    what twist does that barrel have
     
  3. Chrissb18

    Chrissb18

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    1-7.7
     
  4. bigstick6017555

    bigstick6017555 Silver $$ Contributor

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    have you shot it at all and how did it shoot, any pressure signs
     
  5. Chrissb18

    Chrissb18

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    It shot well...no pressure signs on those or hand loaded 105 bergers or 107 smk's. Same Marks tho on all of them. Also harder to chamber and extract live round in cold temperatures. Running 42g h4350 in hand loads. But does that mean I have nearly .25 jam?
     
  6. Chrissb18

    Chrissb18

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    I understand no 2 rifles are the same but a friend has identical rifle and chambers all of them easily no marks on the bullets
     
  7. bigstick6017555

    bigstick6017555 Silver $$ Contributor

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    it sure appears that way, shooting lighter weight bullets or different make might change that, but if you want to shoot these make and weight bullets, in my opinion you will need that throat changed.
     
  8. Chrissb18

    Chrissb18

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    Little too much twist for a light bullet or no? The only reason I thought problem from factory is using a hornday ogive to case length you can kind of push past the drag marks and get a positive feeling of the bullet hitting the lands...and that measurement is within .002 of what my friends rifles measurement is
     
  9. Enosiophobia

    Enosiophobia

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    You mean like this? mir_20190119_114505.jpg
    This is from my 6mm Ruger RPR. I just sent it back last week. This seems to be a growing problem, at least in 6mm Creed.

    I was also using Hornady 108 ELD's.
     
  10. bigstick6017555

    bigstick6017555 Silver $$ Contributor

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    experiment with seating depths and see how that goes
     
  11. Chrissb18

    Chrissb18

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    Yup exact same thing
     
  12. bigstick6017555

    bigstick6017555 Silver $$ Contributor

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    looks like Remington is not the only ones having problems,
     
  13. Chrissb18

    Chrissb18

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  14. Chrissb18

    Chrissb18

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    1.7 twist to me should handle 105-108 gn without me having to back it out .25 inches
     
  15. Enosiophobia

    Enosiophobia

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    You can't seat that bullet .25" deeper in that case. 20190115_191453.jpg
     
  16. Chrissb18

    Chrissb18

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    That's what I thought... so was it reamed for smaller weight bullets or was it a tooling problem. I send it in regardless I'm just curious what going on. That is where I would have to seat it if I were to stop at the first place i felt the bullet touching something
     
  17. Enosiophobia

    Enosiophobia

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    That one on the left was bolt closed touching lands. Right one was new factory ammo, which measure to normal COAL according to SAAMI specs. I dont think they ever reamed my throat.
     
    Last edited: Jan 29, 2019
  18. Chrissb18

    Chrissb18

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    You had same issue?
     
  19. Enosiophobia

    Enosiophobia

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    Mine is a new Ruger Precision, same caliber.
     
  20. varget204

    varget204

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    Some 6 mm creedmoors have Short Freebore as in .104, they can run fromm .104 to over .200. ALWAYS Check Base To Ogive Length of your Chamber,ALWAYS CHECK BTO of Reloaded or FACTORY Rounds.The 108 ELD's are longer than a lot of Short Chambers,See it Frequently in Posts 6 mm creedmoor.Just because it's a Factory Round Always Check,have seen articles people Jamming them .045 to .125.=== SCARY
     

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