Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 185gr | Lapua D46 bullet and 95 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-26 and Alliant Reloder-17.
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.
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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>> | 82% | 54,839 psi | 88% | 2664 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,796 psi | 89% | 2730 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,345 psi | 86% | 2769 fps | 99.6% |
| Accurate 4064 | <<locked>> | 84% | 55,085 psi | 88% | 2713 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,840 psi | 90% | 2822 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 55,419 psi | 89% | 2907 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 86% | 55,085 psi | 88% | 2746 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 53,142 psi | 85% | 2808 fps | 97.9% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,273 psi | 87% | 2854 fps | 96.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,273 psi | 87% | 2864 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 53,316 psi | 85% | 2808 fps | 98% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 53,316 psi | 85% | 2808 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,898 psi | 90% | 2766 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,188 psi | 90% | 2789 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 52,939 psi | 85% | 2825 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 54,041 psi | 87% | 2848 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 56,043 psi | 90% | 2854 fps | 98.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,098 psi | 85% | 2851 fps | 98.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,053 psi | 80% | 2785 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,787 psi | 70% | 2717 fps | 99.1% |
| Alliant Reloder-26 | <<locked>> | 98% | 53,708 psi | 86% | 2923 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,704 psi | 78% | 2779 fps | 97.1% |
| Bofors RP3 | <<locked>> | 84% | 53,171 psi | 85% | 2733 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,098 psi | 85% | 2851 fps | 98.1% |
| Bofors RP7 | <<locked>> | 90% | 56,101 psi | 90% | 2769 fps | 99% |
| Hodgdon H380 | <<locked>> | 84% | 53,722 psi | 86% | 2753 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 54,259 psi | 87% | 2818 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 88% | 54,273 psi | 87% | 2779 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 98% | 54,360 psi | 87% | 2802 fps | 96.2% |
| Hodgdon H4831 SC | <<locked>> | 98% | 53,316 psi | 85% | 2785 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 53,127 psi | 85% | 2749 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,926 psi | 88% | 2785 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 42,743 psi | 69% | 2740 fps | 96.2% |
| Hodgdon Superformance | <<locked>> | 90% | 54,331 psi | 87% | 2854 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,492 psi | 59% | 1713 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,535 psi | 89% | 2746 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,708 psi | 88% | 2730 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 53,867 psi | 86% | 2713 fps | 99.1% |
| IMR 4350 | <<locked>> | 92% | 53,577 psi | 86% | 2753 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,534 psi | 87% | 2749 fps | 99.1% |
| IMR 4831 | <<locked>> | 94% | 56,014 psi | 90% | 2812 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,099 psi | 87% | 2766 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 56,144 psi | 90% | 2792 fps | 96.8% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,605 psi | 83% | 2825 fps | 96.4% |
| Lovex S060 | <<locked>> | 82% | 56,304 psi | 90% | 2717 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 54,853 psi | 88% | 2723 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,418 psi | 87% | 2743 fps | 99.8% |
| Lovex S070 | <<locked>> | 92% | 55,767 psi | 89% | 2785 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,541 psi | 71% | 2628 fps | 98.5% |
| Norma 201 | <<locked>> | 82% | 56,260 psi | 90% | 2733 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,463 psi | 89% | 2776 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,317 psi | 87% | 2802 fps | 97.9% |
| Norma MRP | <<locked>> | 98% | 52,605 psi | 84% | 2877 fps | 99.1% |
| Norma URP | <<locked>> | 92% | 54,520 psi | 87% | 2805 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 56,202 psi | 90% | 2802 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 52,098 psi | 84% | 2841 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 92% | 53,272 psi | 85% | 2808 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,311 psi | 74% | 2720 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,043 psi | 59% | 1752 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 53,679 psi | 86% | 2736 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 53,490 psi | 86% | 2838 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,448 psi | 89% | 2841 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,128 psi | 87% | 2871 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,511 psi | 68% | 2730 fps | 97.2% |
| Rottweil R 902 | <<locked>> | 82% | 53,592 psi | 86% | 2687 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 53,287 psi | 85% | 2730 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 54,824 psi | 88% | 2779 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 98% | 55,071 psi | 88% | 2835 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 90% | 56,101 psi | 90% | 2769 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,418 psi | 87% | 2743 fps | 99.8% |
| Shooters World Precision | <<locked>> | 84% | 54,853 psi | 88% | 2723 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,767 psi | 89% | 2785 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,737 psi | 88% | 2785 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,014 psi | 90% | 2762 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,375 psi | 87% | 2621 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,070 psi | 87% | 2697 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,592 psi | 88% | 2831 fps | 98.3% |
| Somchem S355 | <<locked>> | 86% | 53,432 psi | 86% | 2726 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 52,924 psi | 85% | 2717 fps | 95.9% |
| Somchem S365 | <<locked>> | 94% | 53,606 psi | 86% | 2808 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,854 psi | 90% | 2815 fps | 99% |
| Vihtavuori N135 | <<locked>> | 82% | 53,838 psi | 86% | 2648 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,056 psi | 87% | 2661 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,563 psi | 87% | 2703 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 53,127 psi | 85% | 2749 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,416 psi | 82% | 2733 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 84% | 55,695 psi | 89% | 2707 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,709 psi | 89% | 2805 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,217 psi | 90% | 2864 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 52,982 psi | 85% | 2864 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,333 psi | 90% | 2769 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,520 psi | 87% | 2822 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,295 psi | 73% | 2844 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,072 psi | 90% | 2769 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,956 psi | 90% | 2808 fps | 98.3% |
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% | 51,329 psi | 82% | 2615 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,994 psi | 79% | 2621 fps | 97.8% |
| Accurate 3100 | <<locked>> | 86% | 33,272 psi | 53% | 2395 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 48,646 psi | 78% | 2621 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,014 psi | 59% | 2493 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 98% | 51,793 psi | 83% | 2848 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 45,934 psi | 74% | 2598 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 43,642 psi | 70% | 2638 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 96% | 47,529 psi | 76% | 2736 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,778 psi | 81% | 2808 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 43,874 psi | 70% | 2641 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 43,874 psi | 70% | 2641 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,398 psi | 74% | 2621 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,501 psi | 79% | 2687 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,201 psi | 58% | 2503 fps | 98.3% |
| Alliant Reloder-17 | 58.4 gr | 80% | 40,785 psi | 65% | 2621 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 43,337 psi | 69% | 2635 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 92% | 40,814 psi | 65% | 2625 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,484 psi | 42% | 2264 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,924 psi | 54% | 2487 fps | 96% |
| Alliant Reloder-26 | 61.4 gr | 82% | 30,153 psi | 48% | 2425 fps | 95.1% |
| Bofors RP15 | <<locked>> | 96% | 42,728 psi | 69% | 2664 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 46,659 psi | 75% | 2631 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 40,814 psi | 65% | 2625 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 41,162 psi | 66% | 2510 fps | 96.2% |
| Hodgdon H380 | <<locked>> | 80% | 46,978 psi | 75% | 2641 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 80% | 39,015 psi | 63% | 2539 fps | 96.2% |
| Hodgdon H4350 | <<locked>> | 80% | 41,901 psi | 67% | 2556 fps | 95.6% |
| Hodgdon H4831 | <<locked>> | 96% | 50,879 psi | 82% | 2743 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 96% | 49,893 psi | 80% | 2726 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,678 psi | 54% | 2402 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,285 psi | 82% | 2733 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 40,074 psi | 64% | 2674 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 37,898 psi | 61% | 2546 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,267 psi | 44% | 1529 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,127 psi | 84% | 2697 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,327 psi | 77% | 2631 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,589 psi | 81% | 2661 fps | 98.7% |
| IMR 4350 | <<locked>> | 82% | 39,247 psi | 63% | 2490 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,641 psi | 68% | 2539 fps | 97% |
| IMR 4831 | <<locked>> | 80% | 35,723 psi | 57% | 2451 fps | 97.9% |
| IMR 4895 | <<locked>> | 80% | 50,749 psi | 81% | 2713 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 49,516 psi | 79% | 2687 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 98% | 48,501 psi | 78% | 2769 fps | 95.6% |
| Lovex S060 | <<locked>> | 80% | 52,924 psi | 85% | 2667 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,544 psi | 78% | 2628 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,089 psi | 64% | 2490 fps | 97.7% |
| Lovex S070 | <<locked>> | 80% | 38,305 psi | 61% | 2470 fps | 96.2% |
| Lovex S071 | <<locked>> | 92% | 34,432 psi | 55% | 2421 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 52,794 psi | 85% | 2684 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,878 psi | 78% | 2674 fps | 100% |
| Norma 204 | <<locked>> | 86% | 44,208 psi | 71% | 2628 fps | 95.7% |
| Norma MRP | <<locked>> | 88% | 37,420 psi | 60% | 2579 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 36,840 psi | 59% | 2487 fps | 98% |
| Ramshot Big Game | <<locked>> | 80% | 49,255 psi | 79% | 2700 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 48,356 psi | 78% | 2776 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 35,665 psi | 57% | 2474 fps | 96% |
| Ramshot Magnum | <<locked>> | 96% | 40,147 psi | 64% | 2595 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,659 psi | 44% | 1565 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,152 psi | 76% | 2628 fps | 98.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,337 psi | 69% | 2674 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,753 psi | 59% | 2510 fps | 97.8% |
| ReloadSwiss RS 70 | 59.4 gr | 80% | 35,795 psi | 57% | 2516 fps | 97.2% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 39,668 psi | 64% | 2664 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 50,299 psi | 81% | 2638 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,932 psi | 70% | 2582 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 48,370 psi | 78% | 2674 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 90% | 42,351 psi | 68% | 2615 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 41,162 psi | 66% | 2510 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,089 psi | 64% | 2490 fps | 97.7% |
| Shooters World Precision | <<locked>> | 80% | 48,544 psi | 78% | 2628 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,305 psi | 61% | 2470 fps | 96.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,991 psi | 72% | 2631 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,373 psi | 84% | 2710 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,339 psi | 73% | 2493 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,175 psi | 63% | 2438 fps | 96.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 41,959 psi | 67% | 2608 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 44,280 psi | 71% | 2579 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 49,719 psi | 80% | 2667 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 33,286 psi | 53% | 2448 fps | 99.6% |
| Somchem S385 | <<locked>> | 86% | 37,681 psi | 60% | 2487 fps | 95% |
| Vihtavuori N135 | <<locked>> | 80% | 50,618 psi | 81% | 2605 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,691 psi | 81% | 2615 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,279 psi | 68% | 2513 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,218 psi | 61% | 2487 fps | 98.3% |
| Vihtavuori N165 | <<locked>> | 92% | 39,668 psi | 64% | 2523 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 48,950 psi | 78% | 2612 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,652 psi | 60% | 2487 fps | 98% |
| Vihtavuori N555 | <<locked>> | 80% | 29,066 psi | 47% | 2336 fps | 96% |
| Vihtavuori N560 | <<locked>> | 96% | 49,617 psi | 80% | 2805 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,463 psi | 60% | 2461 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 39,015 psi | 63% | 2539 fps | 96.2% |
| Winchester StaBALL HD | <<locked>> | 82% | 24,990 psi | 40% | 2290 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,388 psi | 84% | 2717 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 42,366 psi | 68% | 2582 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 95 powders for .300 H&H Mag. loaded with the .308 | 185gr | Lapua D46. Alliant Reloder-26 delivers the highest muzzle velocity at 2,923 fps; across all powders the maximum-charge window runs from 1,713 fps to 2,923 fps. Accurate 3100 gives the best case fill at 100 %, and 95 of the 95 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 185.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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-26, Alliant Reloder-17 rank at the top here: for .300 H&H Mag. with the .308 | 185gr | Lapua D46 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.