Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 168gr | Reichenberg HDB Universal bullet and 99 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>> | 86% | 56,086 psi | 90% | 2822 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,824 psi | 88% | 2838 fps | 97.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,355 psi | 76% | 2799 fps | 98.1% |
| Accurate 4064 | <<locked>> | 86% | 52,866 psi | 85% | 2825 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 53,345 psi | 86% | 2920 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 84% | 56,260 psi | 90% | 2907 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 54,099 psi | 87% | 2861 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 55,042 psi | 88% | 2959 fps | 97.2% |
| ADI Benchmark 8208 | <<locked>> | 82% | 55,071 psi | 88% | 2854 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 52,982 psi | 85% | 2979 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 54,882 psi | 88% | 2956 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 54,389 psi | 87% | 2881 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,737 psi | 88% | 2904 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 54,679 psi | 88% | 2982 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 56,028 psi | 90% | 3015 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 54,070 psi | 87% | 2946 fps | 97.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,773 psi | 72% | 2825 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 39,088 psi | 63% | 2723 fps | 96.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 51,155 psi | 82% | 3015 fps | 99.8% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 56,434 psi | 90% | 2927 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 55,085 psi | 88% | 2897 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 54,766 psi | 88% | 2874 fps | 98.1% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,897 psi | 88% | 2884 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,912 psi | 90% | 2917 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 94% | 56,144 psi | 90% | 2976 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 92% | 56,304 psi | 90% | 2936 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 82% | 53,374 psi | 86% | 2864 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 54,723 psi | 88% | 2904 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 53,272 psi | 85% | 2900 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 52,634 psi | 84% | 2949 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,969 psi | 58% | 1791 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,549 psi | 87% | 2867 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 53,838 psi | 86% | 2844 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 53,635 psi | 86% | 2844 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 53,026 psi | 85% | 2822 fps | 98.2% |
| IMR 4350 | <<locked>> | 96% | 55,506 psi | 89% | 2907 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 53,432 psi | 86% | 2854 fps | 98.3% |
| IMR 4831 | <<locked>> | 96% | 54,085 psi | 87% | 2913 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 56,188 psi | 90% | 2933 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 55,071 psi | 88% | 2854 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 56,420 psi | 90% | 2881 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,390 psi | 89% | 2831 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 53,461 psi | 86% | 2838 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 56,376 psi | 90% | 2900 fps | 99.5% |
| Lovex S070 | <<locked>> | 94% | 54,012 psi | 87% | 2884 fps | 98.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 39,059 psi | 63% | 2641 fps | 96.1% |
| Norma 201 | <<locked>> | 84% | 54,752 psi | 88% | 2848 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,738 psi | 89% | 2851 fps | 100% |
| Norma 203B | <<locked>> | 86% | 53,969 psi | 87% | 2890 fps | 100% |
| Norma 204 | <<locked>> | 94% | 52,794 psi | 85% | 2900 fps | 96.6% |
| Norma MRPᴾ | <<locked>> | 100% | 50,227 psi | 81% | 2959 fps | 97.9% |
| Norma URP | <<locked>> | 96% | 56,144 psi | 90% | 2966 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 86% | 54,723 psi | 88% | 2917 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 54,926 psi | 88% | 2963 fps | 99.2% |
| Ramshot TAC | <<locked>> | 82% | 55,274 psi | 89% | 2877 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 82% | 55,361 psi | 89% | 2897 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,390 psi | 58% | 1831 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,970 psi | 90% | 2897 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 55,550 psi | 89% | 2969 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 55,521 psi | 89% | 3009 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 53,432 psi | 86% | 2943 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 56,246 psi | 90% | 3031 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 55,637 psi | 89% | 2828 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,579 psi | 89% | 2851 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,940 psi | 88% | 2890 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 53,142 psi | 85% | 2930 fps | 97.1% |
| Rottweil R 907 | <<locked>> | 92% | 54,766 psi | 88% | 2874 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 94% | 56,376 psi | 90% | 2900 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 84% | 56,420 psi | 90% | 2881 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 53,461 psi | 86% | 2838 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 54,012 psi | 87% | 2884 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 53,258 psi | 85% | 2900 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 53,867 psi | 86% | 2858 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,737 psi | 88% | 2877 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 56,043 psi | 90% | 2785 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 53,490 psi | 86% | 2740 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 52,924 psi | 85% | 2802 fps | 98.2% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 52,649 psi | 84% | 2923 fps | 97% |
| Somchem S335 | <<locked>> | 84% | 55,492 psi | 89% | 2779 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 53,679 psi | 86% | 2848 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 55,042 psi | 88% | 2887 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 54,708 psi | 88% | 2963 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,795 psi | 86% | 2907 fps | 97.9% |
| Vihtavuori N133 | <<locked>> | 82% | 53,243 psi | 85% | 2723 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,825 psi | 90% | 2812 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 56,376 psi | 90% | 2831 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 53,055 psi | 85% | 2815 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,795 psi | 88% | 2907 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 46,224 psi | 74% | 2762 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 82% | 55,434 psi | 89% | 2851 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 54,360 psi | 87% | 2825 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 53,737 psi | 86% | 2907 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,806 psi | 80% | 2904 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 54,723 psi | 88% | 2877 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 56,057 psi | 90% | 2904 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 56,405 psi | 90% | 2979 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,161 psi | 64% | 2854 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,824 psi | 88% | 2887 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 50,459 psi | 81% | 2841 fps | 96.2% |
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% | 45,934 psi | 74% | 2674 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,049 psi | 72% | 2667 fps | 95.8% |
| Accurate 3100 | <<locked>> | 94% | 38,305 psi | 61% | 2625 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 43,497 psi | 70% | 2674 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,430 psi | 52% | 2503 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 49,501 psi | 79% | 2799 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 42,119 psi | 68% | 2648 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 96% | 48,153 psi | 77% | 2838 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,663 psi | 83% | 2802 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,919 psi | 74% | 2851 fps | 99.5% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 48,138 psi | 77% | 2838 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,076 psi | 67% | 2671 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,049 psi | 72% | 2736 fps | 99.4% |
| Alliant Reloder-16 | 54.5 gr | 80% | 32,634 psi | 52% | 2526 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,680 psi | 59% | 2654 fps | 98.8% |
| Alliant Reloder-19 | <<locked>> | 96% | 47,442 psi | 76% | 2828 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 86% | 28,384 psi | 46% | 2428 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 98% | 36,637 psi | 59% | 2661 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 90% | 35,186 psi | 56% | 2674 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,284 psi | 79% | 2815 fps | 99.6% |
| Bofors RP3 | <<locked>> | 80% | 41,872 psi | 67% | 2674 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 42,453 psi | 68% | 2651 fps | 95.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 51,256 psi | 82% | 2831 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,554 psi | 68% | 2680 fps | 98.1% |
| Hodgdon H414 | <<locked>> | 84% | 40,118 psi | 64% | 2680 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 86% | 46,441 psi | 74% | 2766 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 50,009 psi | 80% | 2808 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,950 psi | 48% | 2421 fps | 96.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,470 psi | 75% | 2789 fps | 100% |
| Hodgdon Superformance | 66.7 gr | 86% | 42,337 psi | 68% | 2756 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,629 psi | 43% | 1594 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,921 psi | 77% | 2759 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 50,270 psi | 81% | 2795 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,266 psi | 71% | 2684 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,688 psi | 75% | 2710 fps | 97% |
| IMR 4350 | <<locked>> | 88% | 43,163 psi | 69% | 2687 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 82% | 41,437 psi | 66% | 2631 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 31,618 psi | 51% | 2467 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 46,180 psi | 74% | 2769 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 80% | 51,663 psi | 83% | 2802 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,211 psi | 79% | 2776 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,023 psi | 79% | 2733 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 44,179 psi | 71% | 2684 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 36,245 psi | 58% | 2523 fps | 95.5% |
| Lovex S070 | <<locked>> | 84% | 39,276 psi | 63% | 2608 fps | 95.2% |
| Lovex S071 | <<locked>> | 98% | 36,593 psi | 59% | 2585 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 48,283 psi | 77% | 2746 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,936 psi | 78% | 2749 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,411 psi | 71% | 2726 fps | 99.6% |
| Norma 204 | <<locked>> | 92% | 49,168 psi | 79% | 2838 fps | 95.8% |
| Norma MRP | <<locked>> | 94% | 40,872 psi | 66% | 2772 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 32,793 psi | 53% | 2507 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 44,570 psi | 71% | 2746 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 84% | 36,506 psi | 59% | 2608 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 51,721 psi | 83% | 2822 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,721 psi | 83% | 2838 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,079 psi | 43% | 1637 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,975 psi | 69% | 2671 fps | 96.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,530 psi | 78% | 2858 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 39,059 psi | 63% | 2717 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,343 psi | 52% | 2520 fps | 95% |
| ReloadSwiss RS 70 | 61.1 gr | 82% | 34,432 psi | 55% | 2589 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 52,199 psi | 84% | 2776 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,948 psi | 74% | 2697 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,378 psi | 63% | 2618 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 96% | 46,340 psi | 74% | 2808 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 84% | 42,453 psi | 68% | 2651 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,245 psi | 58% | 2523 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,211 psi | 79% | 2776 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,179 psi | 71% | 2684 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 84% | 39,276 psi | 63% | 2608 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,770 psi | 65% | 2677 fps | 99% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,227 psi | 81% | 2795 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,196 psi | 77% | 2772 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,545 psi | 79% | 2690 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,568 psi | 67% | 2556 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 40,654 psi | 65% | 2579 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 45,890 psi | 74% | 2805 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 49,124 psi | 79% | 2687 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 50,140 psi | 80% | 2792 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 40,045 psi | 64% | 2625 fps | 99.2% |
| Somchem S365 | <<locked>> | 80% | 29,341 psi | 47% | 2457 fps | 97.7% |
| Somchem S385 | <<locked>> | 94% | 43,874 psi | 70% | 2733 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 50,096 psi | 80% | 2677 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 46,006 psi | 74% | 2671 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,383 psi | 74% | 2680 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,159 psi | 61% | 2556 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 34,185 psi | 55% | 2513 fps | 96% |
| Vihtavuori N165 | <<locked>> | 98% | 43,221 psi | 69% | 2707 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 51,909 psi | 83% | 2799 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,672 psi | 72% | 2671 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,620 psi | 54% | 2510 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 86% | 30,908 psi | 50% | 2503 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,779 psi | 54% | 2490 fps | 98.2% |
| Winchester 748 | <<locked>> | 80% | 52,272 psi | 84% | 2848 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 40,118 psi | 64% | 2680 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,587 psi | 46% | 2516 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,964 psi | 77% | 2779 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 47,021 psi | 75% | 2782 fps | 95.3% |
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 99 powders for .300 H&H Mag. loaded with the .308 | 168gr | Reichenberg HDB Universal. ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,031 fps; across all powders the maximum-charge window runs from 1,791 fps to 3,031 fps. Accurate 3100 gives the best case fill at 100 %, and 99 of the 99 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 168.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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 .308 | 168gr | 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.