Load Specifications
Bullet Manufacturer:Reichenberg
Bullet Weight:170 gr
Bullet Diameter:0.309"
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:1:12.5
Load data in caliber .300 H&H Mag. with .309 | 170gr | Reichenberg HDB Universal bullet and 102 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-16 and Hodgdon Superformance.
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% | 52,837 psi | 85% | 2759 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 55,274 psi | 89% | 2828 fps | 98.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,848 psi | 77% | 2792 fps | 98.3% |
| Accurate 4064 | <<locked>> | 86% | 53,345 psi | 86% | 2815 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 53,940 psi | 86% | 2910 fps | 99.9% |
| Accurate High Countryᴾ | <<locked>> | 100% | 52,533 psi | 84% | 2986 fps | 96% |
| ADI AR 2206H | <<locked>> | 82% | 53,200 psi | 85% | 2841 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 54,462 psi | 87% | 2851 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 55,550 psi | 89% | 2953 fps | 97.4% |
| ADI Benchmark 8208 | <<locked>> | 82% | 55,463 psi | 89% | 2844 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 53,229 psi | 85% | 2966 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 55,463 psi | 89% | 2949 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 54,839 psi | 88% | 2871 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 55,201 psi | 89% | 2894 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 54,940 psi | 88% | 2969 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 56,362 psi | 90% | 2999 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 54,578 psi | 88% | 2940 fps | 97.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 47,921 psi | 77% | 2871 fps | 96% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,020 psi | 72% | 2815 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 39,479 psi | 63% | 2720 fps | 97% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 51,532 psi | 83% | 3005 fps | 99.8% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 53,185 psi | 85% | 2861 fps | 99.9% |
| Bofors RP3 | <<locked>> | 88% | 55,564 psi | 89% | 2887 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 47,921 psi | 77% | 2871 fps | 96% |
| Bofors RP7 | <<locked>> | 92% | 55,201 psi | 89% | 2864 fps | 98.2% |
| Hodgdon BL-C2 | <<locked>> | 82% | 55,114 psi | 88% | 2871 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 56,101 psi | 90% | 2904 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 92% | 53,069 psi | 85% | 2910 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 90% | 53,258 psi | 85% | 2871 fps | 97.3% |
| Hodgdon H4895 | <<locked>> | 82% | 53,751 psi | 86% | 2854 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 55,027 psi | 88% | 2894 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 53,737 psi | 86% | 2890 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 53,156 psi | 85% | 2946 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,897 psi | 58% | 1778 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,940 psi | 88% | 2858 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 54,273 psi | 87% | 2835 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 53,795 psi | 86% | 2831 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 53,417 psi | 86% | 2812 fps | 98.4% |
| IMR 4350 | <<locked>> | 96% | 55,985 psi | 90% | 2897 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 53,621 psi | 86% | 2841 fps | 98.4% |
| IMR 4831 | <<locked>> | 96% | 54,346 psi | 87% | 2904 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 53,069 psi | 85% | 2867 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 55,463 psi | 89% | 2844 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 53,026 psi | 85% | 2815 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,767 psi | 89% | 2822 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 53,896 psi | 86% | 2828 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 53,330 psi | 86% | 2838 fps | 99.3% |
| Lovex S070 | <<locked>> | 94% | 54,505 psi | 87% | 2877 fps | 98.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 39,508 psi | 63% | 2635 fps | 96.4% |
| Norma 201 | <<locked>> | 84% | 55,158 psi | 88% | 2838 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,898 psi | 90% | 2835 fps | 100% |
| Norma 203B | <<locked>> | 86% | 54,433 psi | 87% | 2881 fps | 100% |
| Norma 204 | <<locked>> | 94% | 53,069 psi | 85% | 2890 fps | 96.8% |
| Norma MRPᴾ | <<locked>> | 100% | 50,807 psi | 81% | 2956 fps | 98.1% |
| Norma URP | <<locked>> | 96% | 56,376 psi | 90% | 2949 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 55,216 psi | 89% | 2907 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 55,477 psi | 89% | 2953 fps | 99.3% |
| Ramshot TAC | <<locked>> | 82% | 55,651 psi | 89% | 2867 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 82% | 55,550 psi | 89% | 2884 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,550 psi | 59% | 1821 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 56,405 psi | 90% | 2887 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 56,072 psi | 90% | 2963 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 56,101 psi | 90% | 2999 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 53,766 psi | 86% | 2933 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 52,866 psi | 85% | 2963 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 82% | 55,782 psi | 89% | 2812 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,724 psi | 89% | 2835 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 55,390 psi | 89% | 2881 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 53,737 psi | 86% | 2867 fps | 95.8% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 53,403 psi | 86% | 2920 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 92% | 55,201 psi | 89% | 2864 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 92% | 53,330 psi | 86% | 2838 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 82% | 53,026 psi | 85% | 2815 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 53,896 psi | 86% | 2828 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 54,505 psi | 87% | 2877 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 53,751 psi | 86% | 2890 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 54,317 psi | 87% | 2848 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 55,143 psi | 88% | 2867 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 56,405 psi | 90% | 2772 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 53,896 psi | 86% | 2730 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 53,113 psi | 85% | 2789 fps | 98.4% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 52,910 psi | 85% | 2913 fps | 97.1% |
| Somchem S335 | <<locked>> | 84% | 55,883 psi | 90% | 2769 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 54,114 psi | 87% | 2838 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 55,492 psi | 89% | 2877 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 55,288 psi | 89% | 2953 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 54,128 psi | 87% | 2897 fps | 98.1% |
| Vihtavuori N133 | <<locked>> | 82% | 53,563 psi | 86% | 2713 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,999 psi | 90% | 2799 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 53,272 psi | 85% | 2769 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 53,505 psi | 86% | 2805 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 55,288 psi | 89% | 2897 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 46,702 psi | 75% | 2759 fps | 96.2% |
| Vihtavuori N530 | <<locked>> | 82% | 55,854 psi | 90% | 2841 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 54,752 psi | 88% | 2812 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 54,273 psi | 87% | 2897 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 50,372 psi | 81% | 2894 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 55,245 psi | 89% | 2867 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 53,069 psi | 85% | 2910 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,393 psi | 65% | 2848 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 55,288 psi | 89% | 2877 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 50,966 psi | 82% | 2835 fps | 96.4% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 46,340 psi | 74% | 2664 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,179 psi | 72% | 2654 fps | 96% |
| Accurate 3100 | <<locked>> | 92% | 36,056 psi | 58% | 2559 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 43,874 psi | 70% | 2664 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,779 psi | 53% | 2497 fps | 95.8% |
| Accurate High Country | <<locked>> | 98% | 48,762 psi | 78% | 2920 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 49,850 psi | 80% | 2789 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 42,438 psi | 68% | 2638 fps | 99% |
| ADI AR 2209 | <<locked>> | 96% | 48,602 psi | 78% | 2831 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 52,025 psi | 83% | 2792 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 46,296 psi | 74% | 2844 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 45,455 psi | 73% | 2772 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,380 psi | 68% | 2661 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,411 psi | 73% | 2730 fps | 99.5% |
| Alliant Reloder-16 | 54.4 gr | 80% | 32,880 psi | 53% | 2516 fps | 96% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,840 psi | 59% | 2644 fps | 98.9% |
| Alliant Reloder-19 | <<locked>> | 94% | 44,875 psi | 72% | 2766 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 98% | 44,817 psi | 72% | 2808 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 86% | 28,660 psi | 46% | 2425 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 98% | 36,999 psi | 59% | 2657 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 88% | 33,083 psi | 53% | 2602 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,676 psi | 80% | 2805 fps | 99.6% |
| Bofors RP3 | <<locked>> | 80% | 42,250 psi | 68% | 2667 fps | 99.8% |
| Bofors RP5 | <<locked>> | 98% | 44,817 psi | 72% | 2808 fps | 95.1% |
| Bofors RP7 | <<locked>> | 84% | 42,801 psi | 69% | 2644 fps | 95.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 51,692 psi | 83% | 2822 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,888 psi | 69% | 2674 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 84% | 40,306 psi | 65% | 2671 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 84% | 43,671 psi | 70% | 2694 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 50,401 psi | 81% | 2799 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,226 psi | 48% | 2415 fps | 96.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,876 psi | 75% | 2779 fps | 100% |
| Hodgdon Superformance | 66.5 gr | 86% | 42,554 psi | 68% | 2746 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,731 psi | 43% | 1588 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,283 psi | 77% | 2749 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 50,676 psi | 81% | 2782 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,585 psi | 71% | 2674 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,021 psi | 75% | 2703 fps | 97.2% |
| IMR 4350 | <<locked>> | 88% | 43,511 psi | 70% | 2680 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 82% | 41,756 psi | 67% | 2625 fps | 95.8% |
| IMR 4831 | <<locked>> | 80% | 31,763 psi | 51% | 2457 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 46,557 psi | 75% | 2759 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 80% | 52,025 psi | 83% | 2792 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,603 psi | 80% | 2762 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,342 psi | 79% | 2720 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 44,512 psi | 71% | 2674 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 36,535 psi | 59% | 2516 fps | 95.7% |
| Lovex S070 | <<locked>> | 84% | 39,581 psi | 63% | 2602 fps | 95.5% |
| Lovex S071 | <<locked>> | 98% | 36,985 psi | 59% | 2582 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 48,646 psi | 78% | 2736 fps | 100% |
| Norma 202 | <<locked>> | 80% | 49,313 psi | 79% | 2740 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,744 psi | 72% | 2717 fps | 99.6% |
| Norma 204 | <<locked>> | 90% | 46,195 psi | 74% | 2769 fps | 95.1% |
| Norma MRP | <<locked>> | 94% | 41,089 psi | 66% | 2762 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 33,098 psi | 53% | 2500 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 44,976 psi | 72% | 2736 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 36,854 psi | 59% | 2602 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 52,098 psi | 84% | 2812 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,895 psi | 83% | 2825 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,195 psi | 44% | 1627 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,279 psi | 69% | 2661 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,718 psi | 78% | 2841 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 39,218 psi | 63% | 2707 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,648 psi | 52% | 2516 fps | 95.3% |
| ReloadSwiss RS 70 | 60.9 gr | 82% | 34,577 psi | 55% | 2579 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 52,547 psi | 84% | 2766 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 46,238 psi | 74% | 2687 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,711 psi | 64% | 2612 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 96% | 50,270 psi | 81% | 2808 fps | 95% |
| Rottweil R 905 | <<locked>> | 96% | 46,818 psi | 75% | 2805 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 84% | 42,801 psi | 69% | 2644 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,535 psi | 59% | 2516 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,603 psi | 80% | 2762 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,512 psi | 71% | 2674 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 39,581 psi | 63% | 2602 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,930 psi | 66% | 2664 fps | 99.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,662 psi | 81% | 2789 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,341 psi | 78% | 2759 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,879 psi | 80% | 2677 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,829 psi | 67% | 2546 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 40,770 psi | 65% | 2569 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 46,383 psi | 74% | 2799 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 49,472 psi | 79% | 2677 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 50,502 psi | 81% | 2782 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 40,350 psi | 65% | 2615 fps | 99.3% |
| Somchem S365 | <<locked>> | 80% | 29,588 psi | 47% | 2454 fps | 98% |
| Somchem S385 | <<locked>> | 92% | 41,466 psi | 66% | 2671 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 50,415 psi | 81% | 2667 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 46,369 psi | 74% | 2661 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,746 psi | 75% | 2671 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,493 psi | 62% | 2549 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 34,476 psi | 55% | 2507 fps | 96.3% |
| Vihtavuori N165 | <<locked>> | 98% | 43,685 psi | 70% | 2700 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 52,301 psi | 84% | 2789 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 45,005 psi | 72% | 2661 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,939 psi | 54% | 2503 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 86% | 31,256 psi | 50% | 2500 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,040 psi | 55% | 2484 fps | 98.3% |
| Winchester 760 | <<locked>> | 84% | 40,466 psi | 65% | 2674 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 88% | 26,948 psi | 43% | 2444 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 48,109 psi | 77% | 2762 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 47,282 psi | 76% | 2772 fps | 95.5% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 102 powders for .300 H&H Mag. loaded with the .309 | 170gr | Reichenberg HDB Universal. Alliant Reloder-26 delivers the highest muzzle velocity at 3,005 fps; across all powders the maximum-charge window runs from 1,778 fps to 3,005 fps. Accurate 3100 gives the best case fill at 100 %, and 102 of the 102 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 0.309" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, ADI AR 2209 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. ReloadSwiss RS 70, Alliant Reloder-16, Hodgdon Superformance rank at the top here: for .300 H&H Mag. with the .309 | 170gr | Reichenberg HDB Universal they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.