Sako 6PPC Factory Chamber Specs.

Discussion in 'Sako Ammunition' started by RifleNutPPC, Mar 19, 2020.

  1. RifleNutPPC

    RifleNutPPC Well-Known Member

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    There's some fired Norma 6PPC brass for sale on Gunbroker, and the seller has turned the necks to .009", indicating that this gives a loaded round dimension of .261". He then states this brass will fit the Sako factory rifles and others so chambered, and is not for BR work. I was under the impression that Sako chambered the 6PPC with a neck dimension of .272", and would think this brass too thin. Anybody know for sure what Sako 6PPC chamber specs are? Thanks!

     

  2. stonecreek

    stonecreek SCC Secretary Forum Owner SCC Board Member

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    "Too thin" necks will work just fine in a rifle's chamber, however, thin-necked brass may not last as long due to the extra work-hardening it receives when fired and resized. Some will argue whether it will provide less accuracy than brass which is a closer fit for the chamber neck.

    I don't have a reference immediately at hand for the 6PPC USA of the Sako chambers, but SAAMI standards for other 6mm rounds like 6mm Remington and .243 Winchester show a chamber neck diameter of .276" (which would nominally use a cartridge with a neck of about .272").
     
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  3. paulsonconstruction

    paulsonconstruction Sako-addicted

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    The whole purpose of owning a Sako 6PPC is to benefit from it's accuracy potential. The brass you reference will work in your Sako PPC USA chamber but it's not likely to give the best accuracy, so why bother with it. Just do a search online for the SAAMI specs for the Sako 6mm PPC USA chamber to get all the dimensions. The better the neck fit, the better the accuracy!! Just my two cents.
     
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  4. RifleNutPPC

    RifleNutPPC Well-Known Member

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    Yep, accuracy is the whole point. However, finding SAAMI specs on the PPC cartridges is not easy! I assume they exist, but I don't see them on the website at saami.org even though there are dozens of newer cartridges listed. I guess the best thing to do would be to make a chamber cast.
     
  5. CVCOBRA1

    CVCOBRA1 Well-Known Member

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  6. paulsonconstruction

    paulsonconstruction Sako-addicted

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    CIP specs (which is the Euro version of SAAMI) shows a loaded cartridge neck diameter of .268" for the USA version making the neck wall thickness .0125". This would translate to a .272" chamber neck. The USA cartridge also has a fatter diameter body near the web to discourage trying to chamber it in a tight necked 6mm PPC bench rest chamber. That Norma brass could very well have the smaller body diameter which would also make for a sloppy fit. Using Sako brass or brass made to the USA chamber specs is your best option. The link CVCOBRA1 refers to is for the 6MM PPC round NOT the Sako 6mm PPC USA, so that info does NOT apply to your chamber. Good luck!
     
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  7. CVCOBRA1

    CVCOBRA1 Well-Known Member

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    Well, $$$$ it, I tried.
     
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  8. RifleNutPPC

    RifleNutPPC Well-Known Member

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    Thanks guys, I appreciate the help!
     
  9. CVCOBRA1

    CVCOBRA1 Well-Known Member

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    https://www.6mmbr.com/6ppc.html

    A good read here. I think a lot of what the OP is looking for depends if he is shooting matches and wants to shoot in the "one's" or if he just wants a very accurate varmint rig to 300 yards. Not sure the date on the article but they mention IMR 8208 "Thunderbird" the go to powder. Then it became the unicorn, of course now it back. Make sure you read all the way down to the "No Turn" option. If you are picking up a used PPC you are more than likely not going to shoot a match with it.
     
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  10. RifleNutPPC

    RifleNutPPC Well-Known Member

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    I like to do some informal benchrest shooting with my HB Sako, and want to use it for varmints too. Shooting in the "ones" would be amazing, but not likely to happen with the well used rifle I have. (And with my inability to read the wind very well)
    A very good article, thanks!
     

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