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Thread: Advice for reloading 243 at 1750 ft/lbs

  1. #1

    Question Advice for reloading 243 at 1750 ft/lbs

    I'm a complete novice on reloading.
    I have the Lee reloading kit for 243 & 762.

    I've put factory PPU through the 243 and reloaded with 33 - 37g powder but it doesn't look anywhere close to legal muzzle energy.

    The Ruger M77 MkII is meant for deer.
    However with an 18" barrel
    ... can I actually achieve 1750 ft/lbs muzzle energy from it?

    I must use 100g+ bullets.
    I have Vhita N140 powder but it's not listed as use with 105g bullets.

    Looking at the Lapua reloading data for 105g bullets it states I need to use N550 or N165.

    Bit of advice needed here before I waste more s on powder & bullets. Please.

    The N140 I can use with the 763 so at least that isn't wasted.

  2. #2
    This may not be very helpful but i used 43 grains of N160 out of a 24in barrel and used to get just shy of 3000fps but that was with an amax and didnt use it on Deer.

  3. #3
    Quote Originally Posted by Gandy View Post
    This may not be very helpful but i used 43 grains of N160 out of a 24in barrel and used to get just shy of 3000fps but that was with an amax and didnt use it on Deer.
    What type of bullet are you using, Gandy?

  4. #4
    Have you chronographed the speed? If so you just need to calculate bullet weight-FPS to get the ft lbs
    Sounds very unlikely you will meet the legal limit with such a short barrel.
    Have a search on here has been covered before.

  5. #5
    2810fps gives 1753 ft lbs with 100gn bullet

  6. #6
    from vit site
    Bullet Powder Starting load Maximum load
    Weight Type Mfg C.O.L Type Weight Velocity Weight Velocity
    [g] [grs] [mm] [in.] [g] [grs] [m/s] [fps] [g] [grs] [m/s] [fps]
    6,5 100 Grand Slam Speer 68,3 2.689 N150 1,86 28.7 722 2369 2,23 34.4 839 2753
    N540 1,97 30.4 770 2526 2,33 36.0 878 2881
    N550 2,21 34.1 787 2582 2,48 38.3 885 2904
    N160 2,23 34.4 769 2523 2,58 39.8 873 2864

    or from the hogdon site i use h414 4o grains works well for me and others
    95 GR. NOS PART Hodgdon H4895 .243" 2.650" 33.0 2865 45,000 CUP 35.0 2990 50,700 CUP
    100 GR. SPR BTSP Hodgdon H1000 .243" 2.650" 44.0 2876 45,700 CUP 47.0C 3000 49,800 CUP
    100 GR. SPR BTSP IMR IMR 7828 .243" 2.650" 42.5 2796 43,700 CUP 46.0C* 3009 51,100 CUP
    100 GR. SPR BTSP Winchester Supreme 780 .243" 2.650" 45.7 2927 45,600 CUP 47.5 3046 49,300 CUP
    100 GR. SPR BTSP Hodgdon H4831 .243" 2.650" 39.0 2761 44,400 CUP 42.0 2924 50,100 CUP
    100 GR. SPR BTSP Hodgdon Hybrid 100V .243" 2.650" 40.0 2868 45,400 CUP 43.7C 3100 51,700 CUP
    100 GR. SPR BTSP IMR IMR 4831 .243" 2.650" 39.2 2733 43,500 CUP 43.0 2947 50,800 CUP
    100 GR. SPR BTSP Hodgdon H4350 .243" 2.650" 37.0 2806 45,100 CUP 40.0 2973 51,000 CUP
    100 GR. SPR BTSP Hodgdon H414 .243" 2.650" 37.0 2800 44,500 CUP 40.0 2963 50,600 CUP
    100 GR. SPR BTSP IMR IMR 4350 .243" 2.650" 38.5 2760 43,000 CUP 42.0 2958 50,100 CUP
    100 GR. SPR BTSP Winchester 760 .243" 2.650" 37.0 2800 44,500 CUP 40.0 2963 50,600 CUP
    100 GR. SPR BTSP IMR IMR 4007 SSC .243" 2.650" 37.2 2784 47,000 CUP 39.5 2905 50,400 CUP
    100 GR. SPR BTSP Hodgdon H380 .243" 2.650" 34.0 2639 43,600 CUP 36.0 2770 50,100 CUP
    100 GR. SPR BTSP Hodgdon Varget .243" 2.650" 31.0 2674 42,700 CUP 33.7 2838 50,400 CUP
    100 GR. SPR BTSP IMR IMR 4064 .243" 2.650" 33.0 2672 42,200 CUP 36.5 2902 51,100 CUP
    100 GR. SPR BTSP IMR IMR 4895 .243" 2.650" 32.8 2683 42,300 CUP 35.7 2862 50,100 CUP
    100 GR. SPR BTSP Hodgdon H4895 .243" 2.650" 31.0 2683 44,900 CUP 33.0 2818 50,100 CUP
    100 GR. SPR BTSP IMR Trail Boss .243" 2.650" 8.0 1045 27,300 CUP 15.3 1603 39,100 CUP

    sorry you wished 105gr


    105 GR. HDY A-MAX Hodgdon Retumbo .243" 2.760" 46.0 2772 44,200 CUP 49.0C 2986 49,700 CUP
    105 GR. HDY A-MAX Hodgdon H1000 .243" 2.760" 43.0 2798 45,400 CUP 46.0C 2930 50,200 CUP
    105 GR. HDY A-MAX IMR IMR 7828 .243" 2.760" 40.6 2721 44,500 CUP 44.0C 2894 50,300 CUP
    105 GR. HDY A-MAX Winchester Supreme 780 .243" 2.760" 44.2 2872 46,900 CUP 47.0 3036 50,300 CUP
    105 GR. HDY A-MAX Hodgdon H4831 .243" 2.760" 38.0 2687 43,900 CUP 41.0 2846 50,200 CUP
    105 GR. HDY A-MAX Hodgdon Hybrid 100V .243" 2.760" 37.0 2721 43,800 CUP 41.0C 2959 49,300 CUP
    105 GR. HDY A-MAX IMR IMR 4831 .243" 2.760" 38.0 2661 43,700 CUP 41.5 2870 50,800 CUP
    105 GR. HDY A-MAX Hodgdon H4350 .243" 2.760" 35.0 2663 44,300 CUP 37.5 2799 49,500 CUP
    105 GR. HDY A-MAX Hodgdon H414 .243" 2.760" 36.0 2692 43,700 CUP 39.0 2862 50,100 CUP
    105 GR. HDY A-MAX IMR IMR 4350 .243" 2.760" 36.7 2648 43,000 CUP 40.2 2870 50,800 CUP
    105 GR. HDY A-MAX Winchester 760 .243" 2.760" 36.0 2692 43,700 CUP 39.0 2862 50,100 CUP
    105 GR. HDY A-MAX IMR IMR 4007 SSC .243" 2.760" 35.7 2665 43,600 CUP 38.0 2797 49,800 CUP
    105 GR. HDY A-MAX Hodgdon H380 .243" 2.760" 33.0 2589 43,700 CUP 35.0 2687 49,800 CUP
    105 GR. HDY A-MAX Hodgdon Varget .243" 2.760" 31.0 2631 45,600 CUP 33.0 2769 50,800 CUP
    105 GR. HDY A-MAX Hodgdon H4895 .243
    "
    2.760
    "
    30.5 2619 44,900 CUP 32.5 2724 50,100 CUP
    But have you tryed GECO 6mm buggers hit hard and at 20 a box ? worth thinking
    Last edited by paul o'; 24-09-2013 at 13:40.

  7. #7
    No point in publishing data for 24" barrel is there when the guy has 18" barrel.
    He needs velocity to achieve the energy requirement.

    Viht N560 / Vectan SP12 / IMR7828 SSC will just scrape past the 2810fps in 18" barrel approx 56kpsi chamber pressure.

    You will need to carefully work up loads in your rifle with a chrono to verify the velocities.

    Would not bother with the 105's

  8. #8
    Quote Originally Posted by ShootinPeter View Post
    What type of bullet are you using, Gandy?
    105 grain amax.

    Quote Originally Posted by j0e_bl0ggs View Post
    No point in publishing data for 24" barrel is there when the guy has 18" barrel. He needs velocity to achieve the energy requirement. Viht N560 / Vectan SP12 / IMR7828 SSC will just scrape past the 2810fps in 18" barrel approx 56kpsi chamber pressure. You will need to carefully work up loads in your rifle with a chrono to verify the velocities. Would not bother with the 105's
    Hear what youre saying but it may inform thoughts moving forward, Im sure that a shorter barrel will knock a few 100 fps off the velocity. Coincidently your figure is a few hundred feet per second below that which I wrote and with a lighter bullet, so logically hes at the thin end of the wedge, what do you think?

  9. #9
    Quote Originally Posted by Gandy View Post
    Hear what you’re saying but it may inform thoughts moving forward, I’m sure that a shorter barrel will knock a few 100 fps off the velocity. Coincidently your figure is a few hundred feet per second below that which I wrote and with a lighter bullet, so logically he’s at the thin end of the wedge, what do you think?
    So for example with N560 - 2823fps @56kpsi 18" barrel and 3067fps @56kpsi 24" barrel.
    I try to point out that you need to achieve the velocity in the short barrel and that it is not just a case of trying to extrapolate from the 24" barrel data - every barrel will be different.
    Basically data shows that you can get the 100gn to the velocity required - you need to work up to it and use a chrono to verify.

  10. #10

    Unhappy

    Neat, guys. Thanks.
    I'm in the process of adding bells to the club chrony so I can record velocity data direct to my netbook.

    J0e seems to be getting nearer the mark but I could have a problem with less than 105g bullets.
    I think it's the law in England and I know it's the law in Scotland that you must have a bullet at least 105g.

    Assuming Vit N550 with a 105g Lapua I can achieve 2920 (- 200?) fps.
    2720fps using http://www.reloadammo.com/footpound2.htm gives me 1724 ft/lb
    2750 fps gives 1763 ft/lb

    I note A-max 105g bullets have a moly coated option. Does this give any greater fps?

    J0e I note earlier you mentioned N560. Not on my list of Vit powder. Typo or it exists?
    Last edited by ShootinPeter; 24-09-2013 at 14:33. Reason: Typo!

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