My 300ss (Sherman Short) Ruger M77

Discussion in 'Long Range Hunting & Shooting' started by odoylerules, Apr 12, 2019.


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  1. odoylerules

    odoylerules Well-Known Member

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    I finally got my 300ss up and running. I wanted to rebuild my old Ruger M77 (sentimental value). It was the first rifle I ever bought chambered in 7mm mag, and I killed 2 elk with it many many years ago. The Ruger internal box is tiny, like 3.4” which really limits what cartridges I could run. The 300ss was perfect!
    My smith squared the entire action and bedded the original boat paddle stock, which I really wanted to keep.
    It has a Bartlein barrel, 26” 10tw 3b contour.
    Bare rifle weighs sub 7lbs. Launches Berger 215’s at 2870fps. During testing I got close to 3000fps but best accuracy was sub 2900fps.
    As you can see it’s a TACK DRIVER!
    1 hole groups at 100 yards.
     

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    WiscGunner, MWood, TxPhred and 19 others like this.
  2. elkaholic

    elkaholic Official LRH Sponsor

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    WOW!! Ill say its a tack driver! Nice build and good to see how that Ruger worked out. This is typical of how the 300 shoots with a good load. Can anyone spell COMPETITION
    Keep the data coming:D
     
    Lynn Holifield and jpfrog like this.
  3. frostop

    frostop Well-Known Member

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    Very Cool! I like that you have elected to keep the stock!
    I started shooting Ruger's when I was just still in High School 30+ yrs ago, the first rifle I bought was an old tang safely 30.06 and when they came out with the MkII I sold and bought another 30.06 in the Mk II, which I still have today!

    I would love to upgrade the barrel on it someday!

    Gary
     
  4. odoylerules

    odoylerules Well-Known Member

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    8F771808-84F8-4708-9B00-AAE7850834E5.jpeg CBD17E92-C425-4DE1-9200-D95EF81073A2.png My load is 65.2 grains of RE26, Berger 215 going 2870fps. SD 4.2.
    Here’s the load development at 622 yards. 2.25” group.
    Took that back to 100 and shot a ragged hole!!
    Thank you Richard Sherman! (Elkaholic)
     
  5. elkaholic

    elkaholic Official LRH Sponsor

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    Pretty sweet results! Very happy for you:)
    What was coal and barrel length?
     
  6. odoylerules

    odoylerules Well-Known Member

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    C2B71BA0-1A3F-4B14-AC70-517FB6540CC9.jpeg 94BF98E0-8ABE-47AB-8E2C-0C2E6B4490BB.jpeg
    65.2 RE26
    Sherman brass
    Fed 210 primer
    Berger 215
    COAL 3.031
    CBTO 2.245
    2870fps avg
    26” barrel
     
    WiscGunner likes this.
  7. Black Bart

    Black Bart Member

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    Short and fat is where its at! Shocking performance from 65 grains of powder and 215 grain bullet. Before it’s all said and done I will have the 6.5 sst,7sst,and the 300ss switch barrel tikka. Great job rich!
     
    bigngreen likes this.
  8. elkaholic

    elkaholic Official LRH Sponsor

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    Thank you! You should add that to the data link off of my website or just directly to that thread here on LRH
     
  9. elkaholic

    elkaholic Official LRH Sponsor

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    Thank you Bart! They are pretty efficient.
     
  10. odoylerules

    odoylerules Well-Known Member

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    FD081192-483F-4FE7-A8F1-68F1B43DF1E1.jpeg “Terminator and Shermanator!”
     
    slv hunter and mandl like this.
  11. elkaholic

    elkaholic Official LRH Sponsor

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    Yikes. Makes mine want to run for cover!:D
     
  12. odoylerules

    odoylerules Well-Known Member

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    I’m basically getting 300 win mag performance from a short action cartridge!
     
    elkaholic likes this.
  13. elkaholic

    elkaholic Official LRH Sponsor

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    Wait til you see the Max!:eek:
     
  14. MudRunner2005

    MudRunner2005 Well-Known Member

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    Looks good! Next mod would be having your smith drill and tap the receiver so you can run a pic rail and normal rings. EGW makes a base for it, that requires drilling and tapping, but once done, you're good to go.

    http://www.egwguns.com/scope-mounts...-must-drill-tap-receiver-20-moa-ambidextrous/

    I've had M77 MKII's for over 20 years, and I've had plenty of issues with the proprietary rings. Plus, it really limits your options.
     
    frostop likes this.