175 GR SMK vs 190 GR SMK

Discussion in 'Big Stuff -- 6.5mm, 7mm, 30 Cal' started by Pawnee Bill, Mar 19, 2019.

  1. Pawnee Bill

    Pawnee Bill

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    Will I see a difference between these in my Bartlein 1-10 barreled Savage 30/06 at 400-600 yards?
     
  2. Doug Beach

    Doug Beach

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    If both are loaded to similar pressure, the 190 will show a bit less wind drift, and the 175 will have a slightly flatter trajectory. Both will work great out of a 1/10. Which one of these two (both are somewhat obsolete) will work better for you, depends on your intended use, and your particular barrel.
     
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  3. Zero333

    Zero333 Silver $$ Contributor

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    Honestly, which ever one shoots smaller groups at 100 will be the better one at 600.

    I've used both in 308win and can't say one is better than the other, but the 190 liked it above 2,700 fps.

    For the good ol ought SIX, I would definitely start with the 190.

    Following powders would be best in my opinion...

    H-4350
    Hybrid 100-V
    RL-16
    N-150
    N-550
    IMR-4451

    and maybe H-4831sc
     
    Last edited: Mar 19, 2019
  4. Pawnee Bill

    Pawnee Bill

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    How does IMR 4064 do?
     
  5. cmillard

    cmillard

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    My 1903a4 absolutely loves 190 smk and h4350. Scary accurate load and very mild
     
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  6. Meangreen

    Meangreen

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    Good for low pressure M1 Garand type loads, but too fast for modern pressure loads. You will pressure out before you see top velocity.
     
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  7. Zero333

    Zero333 Silver $$ Contributor

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    I agree with what Meangreen said.

    It's a little fast burning for 190's, so the case will not be as full as with the other powders. However, Hodgdon has data for 190's with imr4064 so it's worth a try if you already have some on hand and don't have any of the other one's I've mentioned.

    Hodgdon's data...

    190 gr Hornady BTSP
    Winchester brass
    3.220" coal
    IMR-4064
    Start - 45 gr
    Max - 47.7 gr
     
  8. Pawnee Bill

    Pawnee Bill

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    Thanks for the info!!
     
  9. jr600yd

    jr600yd Gold $$ Contributor

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    My rifle (1/12 30”) favorite load for 1K matches is 190 SMK’s moly, 44.3 IMR-4064, Winchester brass, Federal 210M primer at 2720 FPS.
     
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