243 win. 105gr A-max H4350 "advice"

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by OneShot0351, Nov 5, 2012.

  1. OneShot0351

    OneShot0351 Well-Known Member

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    anyone running this load in a .243? looking for velocities i can expect.
     
  2. ICANHITHIMMAN

    ICANHITHIMMAN Well-Known Member

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    Re: 243 win. 105gr A-max H4350

    Whats your twist rate? New Hornady book says 1-10 wont work
     

  3. OneShot0351

    OneShot0351 Well-Known Member

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    Re: 243 win. 105gr A-max H4350

    I am running 1:8 shilen 24", lapua brass, cci lg rifle 200 primers. i have some loaded 39-41gr in .5 gr increments, just touching the lands.
     
  4. JackinSD

    JackinSD Well-Known Member

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    Re: 243 win. 105gr A-max H4350

    My load:
    39.2gr H4350
    BR2
    .015 off
    2965 fps

    28" 1:8 barrel.
     
  5. OneShot0351

    OneShot0351 Well-Known Member

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    Re: 243 win. 105gr A-max H4350

    Thanks JackinSd, i am hoping to get to the 3k mark.
     
  6. Mikiedem

    Mikiedem Well-Known Member

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    Re: 243 win. 105gr A-max H4350

    Just finished a load with the 105 Hybrids, 45.4 of N165 gave me 2926 fps, SD of 8 out of 24" 9.125 twist.
     
  7. green 788

    green 788 Well-Known Member

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    Re: 243 win. 105gr A-max H4350

    Retumbo at 48.5 grains gave me more than 100 fps advantage over 4831 or 4350... I get 3000 fps from a 24" Douglas barrel.

    Not what you asked... just sayin' :)

    You're going to be somewhere in the 2800's with the 4350 before having the pressures too high, I'd say.

    Dan
     
  8. Trickymissfit

    Trickymissfit Well-Known Member

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    Re: 243 win. 105gr A-max H4350

    try H1000 as well as Retumbo. H414 always worked very well for me in similar cases
    gary
     
  9. OneShot0351

    OneShot0351 Well-Known Member

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    Re: 243 win. 105gr A-max H4350

    I AM NEW TO RELOADING SO ALL INPUT AND SUGGESTIONS ARE WELCOME!
    Thanks, that all helps gives me more powders to look into if i am not getting the velocities i want.
    Not able to get to my chronograph till Sat. so velocities and SD were not available at the moment to even see if im getting the speed i want. It was rainy and 44 degrees today but i had time and had to go ahead and shoot and get a ball park idea of what this rifle would do, as i did the break in w/ 115gr dtac corbon factory loads all groups 1-2"
    where I am now. Lapua brass(from the corbons), cci 200 primers, H4350, 105gr A-max, all loads just touching the lands. COAL 2.804
    Shot 5 4shot groups(20rnds) cleaning and letting cool between charge increments.
    Heres the groups, i will list 4 shot groups and omit a "flyer" for best 3 shot group.(no pressure signs at all brass and primers are great)

    charge 39.0gr: (4).936 (3).657
    39.5 : (4)1.062 (3).522
    40.0 : (4)1.422 (3).987
    40.5 : (4).936 (3).307
    41.0 : (4).657 (3).437
    I am hoping when i shoot thru the chrony Sat. my velocities @ 40.5 and 41 will be at least in the 2900's. and deviation is close. i guess accuracy before speed though.

    just wondering where to go from here back off the lands at 40.5? shoot more groups w/ 40.5 and 41 to get a more consistent idea of which one to work with, also what increments are recommended when backing off the lands?

    In a Nut Shell what im trying to say is for the experienced reloaders out there, where to go from here what to try next if this was your rifle.
     
  10. OneShot0351

    OneShot0351 Well-Known Member

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  11. jcoop

    jcoop Well-Known Member

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    Re: 243 win. 105gr A-max H4350

    +1
    I was getting 2890 with my 4350 38 gr. Load. Switched to retumbo at 49gr. And am getting 3100 with the same group size.
     
  12. OneShot0351

    OneShot0351 Well-Known Member

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    Got what I was hoping for!

    105gr A-max
    Lapua Brass
    CCI 200
    40.5 gr H4350
    .020 jump
    avg vel: 3088fps!
    1/4 moa with this load @ 100yd

    from testing load with different seating depth touching, 0.010,0.020.0.030- avg velocity only fell off 2 fps every 0.010th i backed off the lands, and deviation were all around 7 fps, all loads produced under 1/2 moa.
     
  13. JackinSD

    JackinSD Well-Known Member

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    Looking good then.. Congrats!:D