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Author Topic: 22/250 1 in 12 twist heaviest bullet weight  (Read 5689 times)

Offline 22/250

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22/250 1 in 12 twist heaviest bullet weight
« on: 06:44 AM, 10/11/11 »
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  • hi guys i have a 1 in 12 twist 22/250 and wanted to know if anyone on here has shot the speer 63 grain soft points with this twist ?





    Offline lpreddick

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    22/250 1 in 12 twist heaviest bullet weight
    « Reply #1 on: 09:37 AM, 10/11/11 »
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  • my buddy's 12 twist kreiger shoots berger's 64 gr very nicely using vv550 powder.  the 63s should do fine, i.e. stabilized.  my 14 twist will also shoot this bullet, so a 12 twist might stabilize even a 70 gr?   enjoy.  [/quote] if i can  see you, i can touch you. BANG!
    if i can see you, i can touch you. BANG!

    Offline RwBeV

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    22/250 1 in 12 twist heaviest bullet weight
    « Reply #2 on: 10:46 AM, 10/11/11 »
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  • I have a 12 twist 22PPC that I am in the process of working up loads for the 69gr Sierra so far it looks promising.  As long as the bore is ok and you have the throat you should be able to shoot bullets up to 70 I would think.  Years ago I shot lots of the 63gr SP out of my 14 twist Swift.

    Bob
    I miss my wife, I guess I need a new scope!


    Offline 22/250

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    22/250 1 in 12 twist heaviest bullet weight
    « Reply #3 on: 02:43 PM, 10/11/11 »
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  • cheers guys a friend of mine has offered to give me some to try. if all go's well. im going to load some up for some muntjac deer we have here

    atb jamie

    Offline jonbearman

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    • I live in new york state,how unfortunate !
    22/250 1 in 12 twist heaviest bullet weight
    « Reply #4 on: 08:45 AM, 10/14/11 »
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  • I could never get abouve the 55's and get really good accuracy with a factory remmy 1in14,however the 1in12 might just make it with 64 and under. Use flat base bullets in my opinion as the boatails in certain barrels can cause destabilazion and keyholing evident in my cousins rifle.
    jon t lennon and Norman who is a german shorthair,my buddy!

    Offline A_Gamehog

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    22/250 1 in 12 twist heaviest bullet weight
    « Reply #5 on: 11:41 AM, 11/15/11 »
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  • My Savage Model 16 22-250 with a 12 twist. 100 Yards 3 shots

    "Happiness  for me is a Barred Owl eating a Spotted Owl" Environmentalists watching nature do what I could not.


    Offline dhighlan

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    22/250 1 in 12 twist heaviest bullet weight
    « Reply #6 on: 04:56 PM, 11/19/11 »
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  • I ran 64 Berger Varmints with no problem in factory Savage 1/12 barrel. Tried some 70 vlds and the lack of bearing surface and this weight wouldn't stabilize. Depends on the barrel you are using, and velocity, but I see no problem in 22-250 1/12  stabilizing 63 flat base.

    Offline MrMajestic

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    "That which does not destroy me, has made a huge tactical error"

    Offline Hedge

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    22/250 1 in 12 twist heaviest bullet weight
    « Reply #8 on: 09:27 PM, 11/19/11 »
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  • Any idea what equation JBM uses for their twist results?

    Offline dhighlan

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    22/250 1 in 12 twist heaviest bullet weight
    « Reply #9 on: 12:02 AM, 11/20/11 »
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  • Any idea what equation JBM uses for their twist results?

    Tm=d √30m/s d3 ∫(1+∫2)  ƒv½ = √30m d2/s L(d2+L2) ƒv½


    Offline Hedge

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    22/250 1 in 12 twist heaviest bullet weight
    « Reply #10 on: 12:42 AM, 11/20/11 »
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  • Thanks. :)

    Not knowing what all the variables are, I can take a swag. Still, I see no variable relating to bullet weight. So why do they have a weight input on their on-line calculator?
    « Last Edit: 12:46 AM, 11/20/11 by Hedge »

    Offline dhighlan

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    22/250 1 in 12 twist heaviest bullet weight
    « Reply #11 on: 01:34 AM, 11/20/11 »
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  • Bullet weight is (m) in grains.

    T= twist
    L = length in inches
    v= velocity in ft/sec
    s= stability
    d=diameter
    f= velocity correction factor for temp, altitude, humidity
    « Last Edit: 01:36 AM, 11/20/11 by dhighlan »

    Offline Hedge

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    22/250 1 in 12 twist heaviest bullet weight
    « Reply #12 on: 02:03 AM, 11/20/11 »
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  • Thanks, again.

    Been playing around with different methods. You can really pull your hair out with this.

    Tried Bowman's equation with Howell's SG factor and am getting what I consider reasonable results based on bullet performance in my rifle. However, the Miller equation says the bullet is less than marginally stable with my twist rate.

    Guess what it boils down to is that no one has really figured it out and you just have to shoot 'em and see.


     

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