190smk in 308?

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by TeamSasquatch, Oct 28, 2003.

  1. TeamSasquatch

    TeamSasquatch Active Member

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    Has anyone used the 190gr smk from a 24" barreled 308, and if so how did it perform...What velocities did you get, and how was accuracy...

    Thanks in advance...

    'Squatch.......
     
  2. speedbump

    speedbump Well-Known Member

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    At 300 meters from a 26" barrel, accuraCY WAS @ 1/2 - 3/4 moa. they used about 1/2 the wind as a 168. In fact, they fly very close to a 175. I didn't have a chrono available.
     

  3. MontanaMarine

    MontanaMarine Well-Known Member

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    I've tossed moly coated 190SMKs from my 26" 1-12 twist .308, Rem700 VS. Using 42 and 43gr RL15. Didn't chrono them, but routine accuracy was around .5 moa. Only shot them at 200 yards.

    MM
     
  4. J Schulze

    J Schulze Well-Known Member

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    bro.

    190's in a 308 the load I had worked up shot flatter than 175's to 1 grand. Had them floating in at about 34 MOA. If you want the load post in the hooch it is not for public consumptoin.
     
  5. Michael Eichele

    Michael Eichele Well-Known Member

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    The best load for my 24" 11.25 twist 308 is 41 grains RL-15 and the 190 SMK at 2600 FPS and it averages less than 1" at 300 yards (3 shot)The best I can do w/175 SMK is 2" at 300 yards with MV of 2554 FPS. The 190 makes sense to me [​IMG]
     
  6. Jeff In TX

    Jeff In TX Well-Known Member

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    Curious Question for those shooting 190 gr anything out of a 1:12 twist. How'd you get them to stabilize? Before I put my new 11:27 twist Rock barrel on my .308 rifle, I couldn't get the pervious 1:12 twist barrel to stabilized my 175 gr bullets.

    I can't imagine getting .5 accuracy with a 1:12, but more power to you if you're getting it.
     
  7. MontanaMarine

    MontanaMarine Well-Known Member

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    Before I tried the 190s in my 1-12 barrel, I emailed the techs at Sierra asking about how they would stabilize. They went to the trouble to load up a batch at around 2200 fps and shot them in their testing facility. Their results were a .5" groups at 200 yards. After hearing that, I loaded some up and they shoot fine.

    Interestingly, Berger recommends 1-13 for their 175gr VLD, 1-12 twist for their 190gr VLDs, and 1-11 for their 210gr VLDs.
    http://www.bergerbullets.com/catalog.htm

    MM
     
  8. Michael Eichele

    Michael Eichele Well-Known Member

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    Jeff in TX,

    It sounds almost like you had 1 rifling slightly longer or shorter. A 12 twist isnt the best for the 190, but it will stabilize it. According to some new twist calcs, the 190 at 2600 is at 1.5 stability factor with an 11.25 twist. 12 I think is between there and 1.0 which is still acceptable. I have put these calcs to the test with hair splitting accuracy. 175's can be very accurate from a 12 twist, even 13 twists. If you still have that barrel, I would have it recrowned by a good smith.

    [ 11-01-2003: Message edited by: meichele ]