Need load data: 375 H&H Improved

jtoews80

Handloader
May 19, 2007
919
15
I took in trade a CZ602 chambered in 375 H&H AI. What can I expect from this round? I'll be loading it with 300 grain Partitions (cheapest lead around @ $25/50ct for 2nds). Most likely will be using IMR 4350 or W760.
Will I be able to just start at the max loads for the regular 375 H&H or is the Improvement a big enough change in case volume to big and I'll need to use the powley computer or quickload??

The rifle, brass & dies are still in the mail, tracking says most likely it'll get here monday. Then I can get a case volume and try to figure out what's what.

JT.
 
Cartridge : .375 H.& H. Ackley Imp.
Bullet : .375, 260, Nosler AccuBond 54413
Cartridge O.A.L. L6: 3.750 inch or 95.25 mm
Barrel Length : 24.0 inch or 609.6 mm

Predicted Data for Indicated Charges of the Following Powders.

Matching Maximum Pressure: 62000 psi, or 427 MPa

or a maximum loading ratio or filling of 110 %

These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !

116 loads produced a Loading Ratio below user-defined minimum of 90%. These powders have been skipped.

Powder type Filling/Loading Ratio Charge Charge Vel. Prop.Burnt P max P muzz B_Time
% Grains Gramm fps % psi psi ms
--------------------------------- -----------------------------------------------------------------
Norma MRP 110.0 97.9 6.34 2996 98.7 60746 11533 1.110 ! Near Maximum !
IMR 7828 SSC 110.0 96.3 6.24 2957 95.9 61815 11167 1.099 ! Near Maximum !
Somchem S365 106.6 90.4 5.86 2946 100.0 62000 9826 1.115 ! Near Maximum !
Hodgdon H4350 103.8 88.0 5.70 2934 99.5 62000 10364 1.106 ! Near Maximum !
Ramshot Hunter 104.1 91.7 5.94 2934 99.3 62000 10514 1.113 ! Near Maximum !
Alliant Reloder-19 108.7 92.6 6.00 2928 97.5 62000 10704 1.109 ! Near Maximum !
Alliant Reloder-17 95.8 85.7 5.55 2928 100.0 62000 9952 1.104 ! Near Maximum !
Winchester 760 98.3 88.6 5.74 2927 98.8 62000 10492 1.117 ! Near Maximum !
Vihtavuori N560 110.0 95.8 6.21 2923 94.7 57671 11389 1.138 ! Near Maximum !
ADI AR 2209 107.8 91.4 5.92 2922 97.3 62000 10601 1.104 ! Near Maximum !
Bofors RP14 ~approximation 109.4 93.3 6.04 2920 97.4 62000 10620 1.110 ! Near Maximum !
Norma URP 103.7 87.4 5.66 2917 99.9 62000 10118 1.120 ! Near Maximum !
IMR 4350 106.4 86.8 5.63 2917 99.1 62000 10285 1.113 ! Near Maximum !
Bofors RP19 ~approximation 103.7 87.4 5.67 2917 99.9 62000 10115 1.120 ! Near Maximum !
Vihtavuori N550 100.7 87.7 5.68 2916 99.9 62000 10244 1.126 ! Near Maximum !
ADI AR 2213 110.0 94.8 6.14 2916 95.3 60202 10966 1.113 ! Near Maximum !
Accurate 4350 107.7 87.8 5.69 2915 99.9 62000 10094 1.135 ! Near Maximum !
Hodgdon H414 95.7 86.9 5.63 2902 98.8 62000 10320 1.126 ! Near Maximum !
Alliant Reloder-22 110.0 94.8 6.14 2901 96.7 56896 11068 1.148 ! Near Maximum !
Raufoss RA15 110.0 94.8 6.14 2901 96.7 56896 11068 1.148 ! Near Maximum !
Bofors RP5/NP ~approximation 110.0 94.8 6.14 2901 96.7 56896 11068 1.148 ! Near Maximum !
Raufoss RA4 106.2 90.6 5.87 2900 97.2 62000 10386 1.112 ! Near Maximum !
Bofors RP4 ~approximation 106.2 90.6 5.87 2900 97.2 62000 10386 1.112 ! Near Maximum !
Norma 204 102.9 90.6 5.87 2900 97.2 62000 10386 1.112 ! Near Maximum !
IMR 4831 108.8 88.8 5.76 2900 100.0 62000 9900 1.129 ! Near Maximum !
Ramshot BigGame 96.7 85.1 5.51 2898 100.0 62000 9741 1.121 ! Near Maximum !
Accurate MAGPRO 110.0 99.7 6.46 2897 92.7 56731 11315 1.150 ! Near Maximum !
SNPE Vectan SP 11 96.8 85.2 5.52 2897 100.0 62000 9727 1.121 ! Near Maximum !
Somchem S385 108.9 93.9 6.08 2894 98.3 62000 10273 1.128 ! Near Maximum !
Hodgdon H4831 SC 109.4 94.3 6.11 2887 95.1 62000 10384 1.109 ! Near Maximum !
IMR 4895 95.4 78.7 5.10 2884 100.0 62000 9143 1.107 ! Near Maximum !
Hodgdon Hybrid 100V 110.0 87.7 5.68 2876 100.0 61660 9296 1.122 ! Near Maximum !
Raufoss RA11 94.1 80.2 5.20 2876 100.0 62000 9600 1.130 ! Near Maximum !
Alliant Reloder-15 94.1 80.2 5.20 2876 100.0 62000 9600 1.130 ! Near Maximum !
Bofors RP11 ~approximation 94.1 80.2 5.20 2876 100.0 62000 9600 1.130 ! Near Maximum !
Winchester Supreme 780 106.8 96.0 6.22 2875 97.2 62000 10107 1.113 ! Near Maximum !
Norma 203B 94.6 80.6 5.22 2873 100.0 62000 9520 1.131 ! Near Maximum !
Hodgdon H380 95.4 83.1 5.39 2867 99.8 62000 9724 1.134 ! Near Maximum !
Lovex-S0701 102.9 86.8 5.62 2867 98.9 62000 9937 1.135 ! Near Maximum !
Norma 203 old 96.0 82.7 5.36 2865 100.0 62000 9375 1.143 ! Near Maximum !
Rottweil R904 106.9 89.8 5.82 2863 96.1 62000 10053 1.117 ! Near Maximum !
Rottweil R903 98.2 82.8 5.36 2860 100.0 62000 9296 1.143 ! Near Maximum !
PB Clermont PCL 516 92.0 83.5 5.41 2859 99.8 62000 9607 1.126 ! Near Maximum !
IMR 4320 96.1 80.6 5.22 2858 100.0 62000 9245 1.117 ! Near Maximum !
Somchem S355 98.2 81.9 5.31 2854 100.0 62000 9303 1.138 ! Near Maximum !
SNPE Vectan SP 9 91.8 80.8 5.24 2850 100.0 62000 9280 1.128 ! Near Maximum !
Lovex-S0651 101.6 84.7 5.49 2845 99.5 62000 9597 1.136 ! Near Maximum !
Rottweil R907 100.2 83.9 5.43 2840 98.3 62000 9711 1.132 ! Near Maximum !
IMR 4007 SSC 97.1 83.9 5.44 2839 98.3 62000 9704 1.132 ! Near Maximum !
ADI AR 2208 96.5 79.8 5.17 2839 100.0 62000 9256 1.123 ! Near Maximum !
Hodgdon VARGET 96.8 79.8 5.17 2839 100.0 62000 9256 1.123 ! Near Maximum !
Somchem S341 90.1 82.7 5.36 2834 100.0 62000 9043 1.130 ! Near Maximum !
IMR 3031 93.6 74.6 4.83 2833 100.0 62000 8588 1.136 ! Near Maximum !
Accurate 2520 91.0 79.9 5.18 2831 100.0 62000 8789 1.147 ! Near Maximum !
IMR 4064 97.4 78.4 5.08 2830 100.0 62000 9070 1.127 ! Near Maximum !
Ramshot Magnum (Big Boy) 110.0 100.4 6.51 2829 94.1 53440 10987 1.173
Lovex-S0621 95.1 78.9 5.11 2828 100.0 62000 8926 1.141 ! Near Maximum !
Hodgdon H4895 96.7 79.7 5.17 2827 100.0 62000 8746 1.125 ! Near Maximum !
Accurate 4064 100.1 79.8 5.17 2827 100.0 62000 8780 1.165 ! Near Maximum !
Rottweil R905 110.0 93.1 6.03 2826 94.0 55047 10514 1.169 ! Near Maximum !
SNPE Vectan SP 12 110.0 100.1 6.49 2820 94.1 52914 10942 1.179
PB Clermont PCL 517 110.0 100.1 6.49 2814 93.8 52615 10932 1.182
Winchester WXR 110.0 92.8 6.01 2814 95.4 51749 10792 1.199
Vihtavuori N150 103.4 83.1 5.39 2812 100.0 62000 8741 1.137 ! Near Maximum !
Vihtavuori N540 93.8 80.9 5.24 2812 100.0 62000 8748 1.138 ! Near Maximum !
Rottweil R902 94.0 77.2 5.01 2809 100.0 62000 8768 1.145 ! Near Maximum !
Norma 202 91.5 76.8 4.97 2808 100.0 62000 8585 1.140 ! Near Maximum !
Vihtavuori N140 99.5 81.5 5.28 2805 100.0 62000 8681 1.133 ! Near Maximum !
Accurate 2495 93.1 75.0 4.86 2800 100.0 62000 8436 1.172 ! Near Maximum !
Lovex-S0601 91.7 76.0 4.93 2791 100.0 62000 8659 1.128 ! Near Maximum !
Accurate 2700 98.1 86.3 5.59 2789 98.0 62000 9135 1.137 ! Near Maximum !
Rottweil R901 90.2 73.0 4.73 2786 100.0 62000 8429 1.154 ! Near Maximum !
ADI AR 2206 91.1 76.8 4.98 2780 100.0 62000 8518 1.129 ! Near Maximum !
Hodgdon H4831 110.0 91.1 5.90 2777 93.4 54670 10025 1.173 ! Near Maximum !
ADI AR 2206H 90.2 76.9 4.98 2775 100.0 62000 8490 1.128 ! Near Maximum !
Vihtavuori N135 99.6 77.0 4.99 2774 100.0 62000 8055 1.148 ! Near Maximum !
IMR 7828 110.0 91.1 5.90 2769 92.8 50371 10548 1.207
ADI AP 2214 110.0 97.3 6.31 2766 93.1 52559 10399 1.186
Vihtavuori N165 110.0 92.8 6.01 2752 96.3 53461 9666 1.193
Alliant Reloder-25 110.0 93.3 6.04 2751 97.7 46677 10696 1.248
Somchem S335 91.7 76.5 4.96 2741 100.0 62000 7946 1.149 ! Near Maximum !
Vihtavuori N160 110.0 89.9 5.83 2739 94.4 54721 9524 1.183 ! Near Maximum !
Vihtavuori N133 93.4 72.9 4.72 2717 100.0 62000 7556 1.143 ! Near Maximum !
Norma MRP 2 110.0 93.8 6.08 2644 90.7 41803 10506 1.320
Accurate 3100 110.0 88.7 5.75 2644 96.8 45899 9519 1.302
Vihtavuori N570 110.0 98.9 6.41 2605 82.0 40933 10689 1.333
Hodgdon H1000 110.0 92.8 6.01 2590 89.4 43466 9722 1.296
Hodgdon Retumbo 110.0 94.3 6.11 2520 90.6 37317 10198 1.392
Lovex-D1001 110.0 100.9 6.54 2491 77.5 43300 8736 1.319
Vihtavuori 24N41 110.0 99.9 6.47 2447 73.3 40284 8884 1.358
Vihtavuori N170 110.0 92.8 6.01 2447 80.7 38430 8850 1.399
ADI AR 2218 110.0 99.9 6.47 2430 74.3 37812 9622 1.394
Hodgdon H870 110.0 96.8 6.27 2376 78.5 32635 9484 1.484
Hodgdon 50BMG 110.0 95.2 6.17 2266 64.7 32507 8028 1.498
Hodgdon US 869 110.0 99.9 6.47 2260 68.2 32199 8089 1.507
SNPE Vectan SP 13 110.0 95.8 6.21 2209 72.4 28927 8058 1.575
 
Cartridge : .375 H.& H. Ackley Imp.
Bullet : .375, 300, Nosler PART SP 44845
Cartridge O.A.L. L6: 3.750 inch or 95.25 mm
Barrel Length : 24.0 inch or 609.6 mm

Predicted Data for Indicated Charges of the Following Powders.

Matching Maximum Pressure: 62000 psi, or 427 MPa

or a maximum loading ratio or filling of 110 %

These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !

129 loads produced a Loading Ratio below user-defined minimum of 90%. These powders have been skipped.

Powder type Filling/Loading Ratio Charge Charge Vel. Prop.Burnt P max P muzz B_Time
% Grains Gramm fps % psi psi ms
--------------------------------- -----------------------------------------------------------------
Norma MRP 106.3 95.5 6.19 2830 99.7 62000 11545 1.174 ! Near Maximum !
Vihtavuori N560 107.9 95.0 6.15 2816 97.6 62000 11747 1.173 ! Near Maximum !
Accurate MAGPRO 108.3 99.1 6.42 2808 96.3 62000 11797 1.177 ! Near Maximum !
Ramshot Magnum (Big Boy) 110.0 101.4 6.57 2806 98.3 61915 11546 1.165 ! Near Maximum !
SNPE Vectan SP 12 110.0 101.1 6.55 2797 98.3 61304 11500 1.171 ! Near Maximum !
Alliant Reloder-22 108.2 94.2 6.10 2797 99.0 62000 11332 1.178 ! Near Maximum !
Bofors RP5/NP ~approximation 108.2 94.2 6.10 2797 99.0 62000 11332 1.178 ! Near Maximum !
Raufoss RA15 108.2 94.2 6.10 2797 99.0 62000 11332 1.178 ! Near Maximum !
IMR 7828 SSC 106.2 93.9 6.09 2794 97.9 62000 11326 1.167 ! Near Maximum !
PB Clermont PCL 517 110.0 101.1 6.55 2792 98.1 60944 11507 1.174 ! Near Maximum !
ADI AR 2213 107.1 93.2 6.04 2779 97.8 62000 11218 1.168 ! Near Maximum !
Winchester WXR 110.0 93.7 6.07 2766 98.7 59778 11264 1.198 ! Near Maximum !
Rottweil R905 109.3 93.4 6.05 2758 97.5 62000 10975 1.182 ! Near Maximum !
Alliant Reloder-19 104.5 90.0 5.83 2749 98.9 62000 10753 1.182 ! Near Maximum !
ADI AR 2209 103.9 89.0 5.76 2748 98.8 62000 10674 1.175 ! Near Maximum !
Ramshot Hunter 100.0 88.9 5.76 2746 99.9 62000 10431 1.188 ! Near Maximum !
Hodgdon H4350 99.7 85.4 5.53 2745 100.0 62000 10253 1.181 ! Near Maximum !
Bofors RP14 ~approximation 105.3 90.7 5.88 2743 98.8 62000 10676 1.182 ! Near Maximum !
Winchester 760 94.4 86.0 5.57 2741 99.7 62000 10434 1.191 ! Near Maximum !
Somchem S365 102.0 87.4 5.66 2740 100.0 62000 9663 1.195 ! Near Maximum !
ADI AP 2214 110.0 98.3 6.37 2738 97.6 60037 10994 1.183 ! Near Maximum !
Alliant Reloder-17 92.1 83.2 5.39 2734 100.0 62000 9794 1.178 ! Near Maximum !
IMR 7828 110.0 92.0 5.96 2731 97.2 57570 11142 1.207 ! Near Maximum !
IMR 4350 102.2 84.2 5.46 2730 99.8 62000 10210 1.187 ! Near Maximum !
Vihtavuori N550 96.6 85.0 5.51 2725 100.0 62000 10090 1.201 ! Near Maximum !
Norma URP 99.5 84.7 5.49 2725 100.0 62000 9954 1.196 ! Near Maximum !
Bofors RP19 ~approximation 99.5 84.8 5.49 2725 100.0 62000 9951 1.196 ! Near Maximum !
Bofors RP4 ~approximation 102.3 88.1 5.71 2723 98.7 62000 10448 1.185 ! Near Maximum !
Norma 204 99.0 88.1 5.71 2723 98.7 62000 10448 1.185 ! Near Maximum !
Raufoss RA4 102.3 88.1 5.71 2723 98.7 62000 10448 1.185 ! Near Maximum !
Accurate 4350 103.2 85.0 5.51 2721 100.0 62000 9915 1.212 ! Near Maximum !
Hodgdon H4831 109.9 91.9 5.96 2720 97.1 62000 10552 1.180 ! Near Maximum !
Hodgdon H4831 SC 105.6 91.9 5.96 2720 97.1 62000 10552 1.180 ! Near Maximum !
Hodgdon H414 92.0 84.4 5.47 2719 99.7 62000 10271 1.200 ! Near Maximum !
Somchem S385 104.8 91.2 5.91 2716 99.4 62000 10278 1.202 ! Near Maximum !
Alliant Reloder-25 110.0 94.2 6.10 2710 99.9 53665 10958 1.245 ! Near Maximum !
IMR 4831 104.4 86.1 5.58 2708 100.0 62000 9736 1.205 ! Near Maximum !
Ramshot BigGame 92.8 82.5 5.35 2703 100.0 62000 9580 1.196 ! Near Maximum !
Winchester Supreme 780 103.0 93.5 6.06 2703 98.7 62000 10200 1.187 ! Near Maximum !
SNPE Vectan SP 11 92.9 82.6 5.35 2702 100.0 62000 9567 1.197 ! Near Maximum !
Vihtavuori N165 110.0 93.7 6.07 2695 99.1 61592 10014 1.195 ! Near Maximum !
Rottweil R904 103.0 87.4 5.67 2692 97.9 62000 10159 1.189 ! Near Maximum !
Lovex-S0701 99.0 84.3 5.46 2686 99.7 62000 9893 1.208 ! Near Maximum !
Hodgdon Hybrid 100V 105.7 85.1 5.51 2685 100.0 62000 9153 1.197 ! Near Maximum !
IMR 4895 91.6 76.3 4.94 2684 100.0 62000 8988 1.183 ! Near Maximum !
Alliant Reloder-15 90.4 77.8 5.04 2683 100.0 62000 9428 1.205 ! Near Maximum !
Raufoss RA11 90.4 77.8 5.04 2683 100.0 62000 9428 1.205 ! Near Maximum !
Bofors RP11 ~approximation 90.4 77.8 5.04 2683 100.0 62000 9428 1.205 ! Near Maximum !
Hodgdon H380 91.8 80.7 5.23 2681 100.0 62000 9587 1.208 ! Near Maximum !
Norma 203B 90.8 78.2 5.07 2679 100.0 62000 9355 1.207 ! Near Maximum !
Vihtavuori N160 110.0 90.8 5.88 2677 97.7 62000 9977 1.191 ! Near Maximum !
Norma 203 old 92.1 80.2 5.20 2670 100.0 62000 9218 1.219 ! Near Maximum !
IMR 4320 92.4 78.2 5.07 2666 100.0 62000 9094 1.192 ! Near Maximum !
Rottweil R903 94.2 80.2 5.20 2665 100.0 62000 9136 1.219 ! Near Maximum !
Rottweil R907 96.6 81.6 5.29 2664 99.4 62000 9714 1.204 ! Near Maximum !
IMR 4007 SSC 93.6 81.7 5.29 2664 99.4 62000 9708 1.204 ! Near Maximum !
Lovex-S0651 97.8 82.4 5.34 2664 100.0 62000 9512 1.209 ! Near Maximum !
Somchem S355 94.3 79.4 5.15 2661 100.0 62000 9152 1.213 ! Near Maximum !
Hodgdon VARGET 93.2 77.6 5.03 2651 100.0 62000 9118 1.196 ! Near Maximum !
ADI AR 2208 92.9 77.6 5.03 2651 100.0 62000 9118 1.196 ! Near Maximum !
IMR 4064 93.7 76.2 4.94 2642 100.0 62000 8921 1.202 ! Near Maximum !
Lovex-S0621 91.4 76.6 4.96 2635 100.0 62000 8781 1.216 ! Near Maximum !
Hodgdon H4895 92.9 77.4 5.01 2632 100.0 62000 8618 1.201 ! Near Maximum !
Norma MRP 2 110.0 94.7 6.14 2628 96.0 48588 11229 1.311
Accurate 4064 95.8 77.1 5.00 2626 100.0 62000 8621 1.243 ! Near Maximum !
Vihtavuori N150 99.4 80.8 5.23 2621 100.0 62000 8625 1.213 ! Near Maximum !
Accurate 2700 94.6 84.2 5.45 2619 99.2 62000 9163 1.209 ! Near Maximum !
Rottweil R902 90.4 75.0 4.86 2618 100.0 62000 8629 1.220 ! Near Maximum !
Vihtavuori N540 90.2 78.5 5.09 2617 100.0 62000 8638 1.214 ! Near Maximum !
Vihtavuori N140 95.8 79.3 5.14 2616 100.0 62000 8561 1.208 ! Near Maximum !
Vihtavuori N570 110.0 99.9 6.47 2614 89.2 47296 11821 1.320
Accurate 3100 110.0 89.6 5.80 2598 99.4 53714 9815 1.294 ! Near Maximum !
Vihtavuori N135 95.6 74.6 4.83 2575 100.0 62000 7931 1.227 ! Near Maximum !
Hodgdon H1000 110.0 93.7 6.07 2573 95.1 49535 10467 1.293
Hodgdon Retumbo 110.0 95.2 6.17 2521 96.8 42739 11009 1.382
Lovex-D1001 110.0 101.9 6.60 2481 83.9 49609 9658 1.313
ADI AR 2218 110.0 100.9 6.54 2461 83.9 43128 11145 1.381
Vihtavuori 24N41 110.0 100.9 6.54 2448 80.4 45828 9975 1.352
Vihtavuori N170 110.0 93.7 6.07 2431 86.8 44582 9700 1.392
Hodgdon H870 110.0 97.8 6.34 2396 86.7 37605 10669 1.475
Hodgdon 50BMG 110.0 96.2 6.23 2272 71.8 37059 9134 1.497
 
Back in 1962, Parker O. Ackley stated in his Handbook For Shooters & Reloaders, a load for the 300 gr. in his Improved .375 H&H was 88.0 of 4350, producing 2740 FPS.

IMR 4350 powder back in those days could have been a slightly slower lot of powder than what we have now, so load accordingly.

YMMV,
 
I have a .375-.358STA and I shoot 89grs of IMR4350 with a 250 Sierra at 3080fps. I've kill 6 or 7 elk and numerous deer with that gun. The furthest of which was a bull elk at around 650yds. The .375's are hard on critters as are the .416's. The .416's give up trajectory to a .375 though.
 
I know Fotis. I'm not impressed with the company so I doubt I will spend the money on them. It would make a .416 Rem. Mag into a .338 Lapua/Edge for trajectory with more energy. Something from a .416 RUM to a .416 Snipetac would be flat awesome with those.
 
I talked to Dan and they are redesigning them with larger HP and a Ballistic tip to enhance BC and expansion. Available March/April
 
Well then I might try them. But if they didn't shoot in the first box of them I'd be done. I have a .416 RUM reamer but a .416 Snipetac sounds cooler. It's just hard to build a gun around one bullet.
 
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