Load Specifications
Bullet Manufacturer:Speer
Bullet Weight:170 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Caliber:.300 H&H Mag. load data
Case Length (l3):2.85"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:85.9 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:62,366 psi
Recommended Twist Rate:1:14.5
Load data in caliber .300 H&H Mag. with .308 | 170gr | Speer Deep Curl Flat Points bullet and 92 powders. The key underlying parameters are shown in the table above.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 84% | 56,014 psi | 90% | 2799 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,867 psi | 86% | 2808 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,792 psi | 81% | 2841 fps | 98.9% |
| Accurate 4064 | <<locked>> | 86% | 56,318 psi | 90% | 2851 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 53,113 psi | 85% | 2897 fps | 99.9% |
| Accurate High Countryᴾ | <<locked>> | 100% | 55,448 psi | 89% | 3035 fps | 96.7% |
| ADI AR 2206H | <<locked>> | 82% | 55,463 psi | 89% | 2881 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 53,127 psi | 85% | 2828 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,288 psi | 87% | 2936 fps | 97.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,709 psi | 89% | 3005 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 53,722 psi | 86% | 2854 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,012 psi | 87% | 2874 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 53,969 psi | 87% | 2956 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,114 psi | 88% | 2982 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 53,534 psi | 86% | 2923 fps | 97.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,575 psi | 81% | 2920 fps | 96.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,776 psi | 77% | 2861 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,626 psi | 67% | 2769 fps | 97.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,766 psi | 88% | 3054 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,245 psi | 89% | 2894 fps | 100% |
| Bofors RP3 | <<locked>> | 86% | 54,534 psi | 87% | 2871 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,575 psi | 81% | 2920 fps | 96.8% |
| Bofors RP7 | <<locked>> | 90% | 54,099 psi | 87% | 2848 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 86% | 55,100 psi | 88% | 2887 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 92% | 55,419 psi | 89% | 2949 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 90% | 55,492 psi | 89% | 2910 fps | 97.9% |
| Hodgdon H4895 | <<locked>> | 82% | 56,086 psi | 90% | 2887 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,099 psi | 87% | 2877 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,246 psi | 90% | 2927 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 55,579 psi | 89% | 2986 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,143 psi | 58% | 1788 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 53,650 psi | 86% | 2838 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,956 psi | 90% | 2864 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,361 psi | 89% | 2848 fps | 98.8% |
| IMR 4350 | <<locked>> | 94% | 54,897 psi | 88% | 2881 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,709 psi | 89% | 2877 fps | 98.8% |
| IMR 4831 | <<locked>> | 94% | 53,621 psi | 86% | 2890 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 55,434 psi | 89% | 2904 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,869 psi | 90% | 2854 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,404 psi | 87% | 2802 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,260 psi | 90% | 2861 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,738 psi | 89% | 2877 fps | 99.6% |
| Lovex S070 | <<locked>> | 92% | 53,519 psi | 86% | 2861 fps | 98.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,119 psi | 68% | 2684 fps | 97.2% |
| Norma 201 | <<locked>> | 82% | 54,143 psi | 87% | 2822 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,781 psi | 88% | 2818 fps | 100% |
| Norma 203B | <<locked>> | 84% | 53,301 psi | 85% | 2861 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,492 psi | 89% | 2930 fps | 97.4% |
| Norma MRPᴾ | <<locked>> | 100% | 53,621 psi | 86% | 3002 fps | 98.7% |
| Norma URP | <<locked>> | 94% | 55,506 psi | 89% | 2936 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 53,896 psi | 86% | 2884 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 54,259 psi | 87% | 2936 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,854 psi | 59% | 1831 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,998 psi | 88% | 2867 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,882 psi | 88% | 2943 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,694 psi | 88% | 2976 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 53,040 psi | 85% | 2920 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,274 psi | 89% | 3002 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 84% | 54,955 psi | 88% | 2825 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,607 psi | 88% | 2867 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 56,072 psi | 90% | 2907 fps | 96.5% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,318 psi | 90% | 2966 fps | 97.9% |
| Rottweil R 907 | <<locked>> | 90% | 54,099 psi | 87% | 2848 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,738 psi | 89% | 2877 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,869 psi | 90% | 2854 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,260 psi | 90% | 2861 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 53,519 psi | 86% | 2861 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,130 psi | 90% | 2923 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,882 psi | 86% | 2848 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,071 psi | 88% | 2756 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,753 psi | 89% | 2756 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,637 psi | 89% | 2831 fps | 98.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,811 psi | 89% | 2963 fps | 97.8% |
| Somchem S335 | <<locked>> | 82% | 54,737 psi | 88% | 2753 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,231 psi | 90% | 2867 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,607 psi | 88% | 2861 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 54,520 psi | 87% | 2940 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 53,490 psi | 86% | 2887 fps | 98.1% |
| Vihtavuori N133 | <<locked>> | 82% | 55,579 psi | 89% | 2740 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,158 psi | 88% | 2785 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,521 psi | 89% | 2802 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,970 psi | 90% | 2838 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,186 psi | 87% | 2881 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,110 psi | 79% | 2799 fps | 96.9% |
| Vihtavuori N540 | <<locked>> | 84% | 53,563 psi | 86% | 2795 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 53,214 psi | 85% | 2881 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,301 psi | 85% | 2940 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 53,838 psi | 86% | 2851 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,680 psi | 89% | 2953 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,902 psi | 69% | 2904 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 53,983 psi | 87% | 2858 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,359 psi | 86% | 2877 fps | 97.1% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 49,211 psi | 79% | 2700 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,195 psi | 76% | 2694 fps | 96.6% |
| Accurate 3100 | <<locked>> | 90% | 36,129 psi | 58% | 2559 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 46,557 psi | 75% | 2707 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,215 psi | 56% | 2552 fps | 96.9% |
| Accurate High Country | <<locked>> | 96% | 48,138 psi | 77% | 2907 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 52,112 psi | 84% | 2825 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,237 psi | 71% | 2674 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 94% | 47,718 psi | 77% | 2818 fps | 95.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,457 psi | 78% | 2884 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,483 psi | 71% | 2700 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,688 psi | 76% | 2769 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,635 psi | 56% | 2562 fps | 96.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,885 psi | 62% | 2690 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 94% | 46,992 psi | 75% | 2805 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,237 psi | 71% | 2799 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 84% | 28,660 psi | 46% | 2421 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,577 psi | 55% | 2592 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 86% | 32,866 psi | 53% | 2595 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,735 psi | 83% | 2838 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 44,730 psi | 72% | 2710 fps | 99.9% |
| Bofors RP5 | <<locked>> | 96% | 44,237 psi | 71% | 2799 fps | 95.1% |
| Bofors RP7 | <<locked>> | 82% | 42,134 psi | 68% | 2631 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 45,136 psi | 72% | 2717 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 82% | 39,784 psi | 64% | 2657 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 84% | 45,847 psi | 74% | 2740 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 80% | 52,721 psi | 85% | 2838 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,082 psi | 51% | 2461 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,139 psi | 79% | 2815 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 41,713 psi | 67% | 2730 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,992 psi | 43% | 1598 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,386 psi | 81% | 2785 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,528 psi | 75% | 2710 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,776 psi | 78% | 2736 fps | 97.7% |
| IMR 4350 | <<locked>> | 86% | 42,685 psi | 68% | 2661 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,002 psi | 66% | 2608 fps | 95.7% |
| IMR 4831 | <<locked>> | 80% | 33,968 psi | 54% | 2507 fps | 96.5% |
| IMR 4895 | <<locked>> | 80% | 48,921 psi | 78% | 2799 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 52,170 psi | 84% | 2802 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,169 psi | 82% | 2753 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,688 psi | 75% | 2710 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,479 psi | 62% | 2556 fps | 96.5% |
| Lovex S070 | <<locked>> | 82% | 39,073 psi | 63% | 2585 fps | 95.4% |
| Lovex S071 | <<locked>> | 96% | 37,028 psi | 59% | 2579 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 50,908 psi | 82% | 2772 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,416 psi | 82% | 2769 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,065 psi | 75% | 2756 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 45,324 psi | 73% | 2753 fps | 95% |
| Norma MRP | <<locked>> | 92% | 40,756 psi | 65% | 2756 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 35,070 psi | 56% | 2549 fps | 96.7% |
| Ramshot Big Game | <<locked>> | 80% | 47,137 psi | 76% | 2776 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 36,463 psi | 58% | 2589 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,499 psi | 44% | 1637 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,136 psi | 72% | 2697 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,184 psi | 82% | 2884 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,350 psi | 66% | 2749 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,867 psi | 56% | 2566 fps | 96.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 34,185 psi | 55% | 2566 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 48,501 psi | 78% | 2723 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,003 psi | 67% | 2654 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 94% | 49,414 psi | 79% | 2795 fps | 95% |
| Rottweil R 905 | <<locked>> | 94% | 46,006 psi | 74% | 2789 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 82% | 42,134 psi | 68% | 2631 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,479 psi | 62% | 2556 fps | 96.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,170 psi | 84% | 2802 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,688 psi | 75% | 2710 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 39,073 psi | 63% | 2585 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,062 psi | 69% | 2703 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,473 psi | 81% | 2795 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,909 psi | 83% | 2710 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,758 psi | 70% | 2575 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 40,190 psi | 64% | 2556 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 45,585 psi | 73% | 2782 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 51,503 psi | 83% | 2707 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,634 psi | 84% | 2815 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,511 psi | 68% | 2654 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 31,575 psi | 51% | 2503 fps | 98.7% |
| Somchem S385 | <<locked>> | 90% | 41,075 psi | 66% | 2661 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 52,417 psi | 84% | 2694 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,660 psi | 78% | 2694 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,776 psi | 78% | 2703 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,480 psi | 65% | 2585 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 36,593 psi | 59% | 2552 fps | 97.1% |
| Vihtavuori N165 | <<locked>> | 96% | 43,149 psi | 69% | 2690 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 47,181 psi | 76% | 2697 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,027 psi | 58% | 2549 fps | 96.7% |
| Vihtavuori N555 | <<locked>> | 82% | 29,356 psi | 47% | 2441 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,824 psi | 57% | 2523 fps | 98.9% |
| Winchester 760 | <<locked>> | 82% | 39,958 psi | 64% | 2661 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 86% | 27,006 psi | 43% | 2444 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,531 psi | 81% | 2802 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 46,441 psi | 74% | 2756 fps | 95.5% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 108 powders for .300 H&H Mag. loaded with the .308 | 170gr | Speer Deep Curl Flat Points. Alliant Reloder-26 delivers the highest muzzle velocity at 3,054 fps; across all powders the maximum-charge window runs from 1,788 fps to 3,054 fps. Accurate 3100 gives the best case fill at 100 %, and 108 of the 108 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.308" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, Accurate MAGPRO reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. As outliers, Accurate MAGPRO, Baschieri & Pellagri 109, Hodgdon H1000 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.