Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 185gr | Berger Classic Hybrid Hunter 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 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>> | 82% | 54,433 psi | 87% | 2654 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,521 psi | 89% | 2720 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,055 psi | 85% | 2762 fps | 99.5% |
| Accurate 4064 | <<locked>> | 84% | 54,679 psi | 88% | 2707 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,230 psi | 89% | 2812 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 53,940 psi | 86% | 2897 fps | 97.2% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 54,940 psi | 88% | 2897 fps | 96.1% |
| ADI AR 2208 | <<locked>> | 86% | 54,766 psi | 88% | 2736 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 56,231 psi | 90% | 2854 fps | 98.3% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 53,853 psi | 86% | 2844 fps | 96.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 53,867 psi | 86% | 2854 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 56,376 psi | 90% | 2851 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,564 psi | 89% | 2759 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,825 psi | 90% | 2782 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,956 psi | 90% | 2864 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 53,447 psi | 86% | 2835 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 55,564 psi | 89% | 2841 fps | 98.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,576 psi | 84% | 2841 fps | 98% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,821 psi | 80% | 2782 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,352 psi | 70% | 2703 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 98% | 53,185 psi | 85% | 2913 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,240 psi | 77% | 2766 fps | 97% |
| Bofors RP3 | <<locked>> | 86% | 56,405 psi | 90% | 2776 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,576 psi | 84% | 2841 fps | 98% |
| Bofors RP7 | <<locked>> | 90% | 55,825 psi | 90% | 2762 fps | 99% |
| Hodgdon H380 | <<locked>> | 84% | 53,374 psi | 86% | 2743 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 53,940 psi | 86% | 2808 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 88% | 53,751 psi | 86% | 2769 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 98% | 54,128 psi | 87% | 2792 fps | 96.1% |
| Hodgdon H4831 SC | <<locked>> | 98% | 52,881 psi | 85% | 2772 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 56,260 psi | 90% | 2789 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,375 psi | 87% | 2776 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 53,780 psi | 86% | 2844 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,376 psi | 58% | 1706 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,201 psi | 89% | 2740 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,346 psi | 87% | 2720 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 53,563 psi | 86% | 2703 fps | 99% |
| IMR 4350 | <<locked>> | 92% | 53,301 psi | 85% | 2743 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,012 psi | 87% | 2736 fps | 99% |
| IMR 4831 | <<locked>> | 94% | 55,695 psi | 89% | 2802 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 53,722 psi | 86% | 2756 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 55,709 psi | 89% | 2782 fps | 96.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,387 psi | 82% | 2815 fps | 96.3% |
| Lovex S060 | <<locked>> | 82% | 55,999 psi | 90% | 2707 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 54,476 psi | 87% | 2713 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,143 psi | 87% | 2736 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 55,245 psi | 89% | 2776 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,063 psi | 71% | 2618 fps | 98.4% |
| Norma 201 | <<locked>> | 82% | 55,927 psi | 90% | 2726 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,114 psi | 88% | 2766 fps | 100% |
| Norma 204 | <<locked>> | 92% | 53,824 psi | 86% | 2792 fps | 97.8% |
| Norma MRPᴾ | <<locked>> | 100% | 56,014 psi | 90% | 2927 fps | 99.4% |
| Norma URP | <<locked>> | 92% | 53,911 psi | 86% | 2795 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 55,912 psi | 90% | 2795 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 51,634 psi | 83% | 2831 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 94% | 56,275 psi | 90% | 2848 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,890 psi | 74% | 2707 fps | 97.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,144 psi | 60% | 1749 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 53,142 psi | 85% | 2726 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 53,142 psi | 85% | 2831 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,158 psi | 88% | 2835 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 53,621 psi | 86% | 2861 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,177 psi | 68% | 2717 fps | 97% |
| Rottweil R 902 | <<locked>> | 82% | 53,258 psi | 85% | 2680 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 52,939 psi | 85% | 2723 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 54,563 psi | 87% | 2772 fps | 97% |
| Rottweil R 905 | <<locked>> | 98% | 54,839 psi | 88% | 2828 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 90% | 55,825 psi | 90% | 2762 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,143 psi | 87% | 2736 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 54,476 psi | 87% | 2713 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,245 psi | 89% | 2776 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,447 psi | 87% | 2782 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,680 psi | 89% | 2756 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,273 psi | 87% | 2615 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 53,795 psi | 86% | 2690 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,360 psi | 87% | 2825 fps | 98.2% |
| Somchem S335 | <<locked>> | 82% | 56,391 psi | 90% | 2654 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 56,318 psi | 90% | 2766 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 56,115 psi | 90% | 2766 fps | 96.5% |
| Somchem S365 | <<locked>> | 94% | 53,287 psi | 85% | 2802 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,317 psi | 89% | 2802 fps | 98.9% |
| Vihtavuori N135 | <<locked>> | 82% | 53,388 psi | 86% | 2638 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 53,708 psi | 86% | 2657 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,259 psi | 87% | 2697 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 56,086 psi | 90% | 2789 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,169 psi | 82% | 2726 fps | 98% |
| Vihtavuori N540 | <<locked>> | 84% | 55,390 psi | 89% | 2700 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,216 psi | 89% | 2795 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 55,637 psi | 89% | 2854 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 56,391 psi | 90% | 2917 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,811 psi | 89% | 2762 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 53,940 psi | 86% | 2808 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,846 psi | 72% | 2831 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,724 psi | 89% | 2762 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,448 psi | 89% | 2799 fps | 98.2% |
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% | 50,937 psi | 82% | 2608 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,689 psi | 78% | 2612 fps | 97.7% |
| Accurate 3100 | <<locked>> | 86% | 33,011 psi | 53% | 2385 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 48,240 psi | 77% | 2615 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,651 psi | 59% | 2480 fps | 98.1% |
| Accurate High Country | <<locked>> | 94% | 46,876 psi | 75% | 2772 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 98% | 51,314 psi | 82% | 2838 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 45,614 psi | 73% | 2589 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 43,381 psi | 70% | 2628 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 98% | 50,328 psi | 81% | 2782 fps | 95.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,169 psi | 80% | 2795 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 43,584 psi | 70% | 2631 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,006 psi | 74% | 2612 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,139 psi | 79% | 2677 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,911 psi | 58% | 2493 fps | 98.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,466 psi | 65% | 2612 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 43,091 psi | 69% | 2625 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 94% | 43,105 psi | 69% | 2671 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,252 psi | 42% | 2254 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,736 psi | 54% | 2480 fps | 95.9% |
| Alliant Reloder-26 | 62.5 gr | 84% | 32,126 psi | 52% | 2480 fps | 96.1% |
| Bofors RP15 | <<locked>> | 96% | 42,511 psi | 68% | 2657 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 46,282 psi | 74% | 2621 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 43,105 psi | 69% | 2671 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 40,843 psi | 65% | 2500 fps | 96% |
| Hodgdon H380 | <<locked>> | 80% | 46,659 psi | 75% | 2635 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 38,711 psi | 62% | 2530 fps | 96% |
| Hodgdon H4350 | <<locked>> | 80% | 41,582 psi | 67% | 2549 fps | 95.4% |
| Hodgdon H4831 | <<locked>> | 96% | 50,633 psi | 81% | 2736 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 96% | 49,458 psi | 79% | 2717 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,373 psi | 54% | 2392 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,923 psi | 82% | 2726 fps | 100% |
| Hodgdon Superformance | 61.4 gr | 80% | 37,681 psi | 60% | 2536 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,108 psi | 43% | 1522 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,996 psi | 83% | 2694 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,993 psi | 77% | 2621 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,314 psi | 81% | 2651 fps | 98.6% |
| IMR 4350 | <<locked>> | 82% | 38,957 psi | 62% | 2484 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,322 psi | 68% | 2530 fps | 96.9% |
| IMR 4831 | <<locked>> | 80% | 35,389 psi | 57% | 2441 fps | 97.8% |
| IMR 4895 | <<locked>> | 80% | 50,415 psi | 81% | 2707 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 49,298 psi | 79% | 2677 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 98% | 48,080 psi | 77% | 2756 fps | 95.4% |
| Lovex S060 | <<locked>> | 80% | 52,547 psi | 84% | 2657 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,182 psi | 77% | 2618 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,769 psi | 64% | 2480 fps | 97.6% |
| Lovex S070 | <<locked>> | 80% | 37,985 psi | 61% | 2461 fps | 96% |
| Lovex S071 | <<locked>> | 92% | 34,156 psi | 55% | 2415 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 52,446 psi | 84% | 2674 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,501 psi | 78% | 2664 fps | 100% |
| Norma 204 | <<locked>> | 86% | 43,903 psi | 70% | 2618 fps | 95.5% |
| Norma MRP | <<locked>> | 88% | 37,014 psi | 59% | 2566 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 36,506 psi | 59% | 2477 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 80% | 48,747 psi | 78% | 2687 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 47,892 psi | 77% | 2766 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 35,389 psi | 57% | 2464 fps | 95.8% |
| Ramshot Magnum | <<locked>> | 96% | 39,813 psi | 64% | 2585 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,688 psi | 44% | 1562 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,847 psi | 75% | 2621 fps | 98.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,018 psi | 69% | 2667 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,434 psi | 58% | 2500 fps | 97.7% |
| ReloadSwiss RS 70 | 58.9 gr | 80% | 35,375 psi | 57% | 2503 fps | 96.9% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 39,334 psi | 63% | 2651 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 50,169 psi | 80% | 2635 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,613 psi | 70% | 2572 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 47,906 psi | 77% | 2661 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 90% | 42,076 psi | 67% | 2605 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 40,843 psi | 65% | 2500 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,769 psi | 64% | 2480 fps | 97.6% |
| Shooters World Precision | <<locked>> | 80% | 48,182 psi | 77% | 2618 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,985 psi | 61% | 2461 fps | 96% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,657 psi | 72% | 2621 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,054 psi | 83% | 2703 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,991 psi | 72% | 2484 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,030 psi | 63% | 2431 fps | 96.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 41,669 psi | 67% | 2602 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 52,997 psi | 85% | 2608 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,947 psi | 70% | 2572 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 52,707 psi | 85% | 2713 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 32,996 psi | 53% | 2438 fps | 99.5% |
| Somchem S385 | <<locked>> | 88% | 39,943 psi | 64% | 2533 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 50,183 psi | 80% | 2595 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,372 psi | 81% | 2608 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,930 psi | 67% | 2503 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,898 psi | 61% | 2477 fps | 98.2% |
| Vihtavuori N165 | <<locked>> | 92% | 39,233 psi | 63% | 2510 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 48,617 psi | 78% | 2602 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,347 psi | 60% | 2480 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 80% | 28,906 psi | 46% | 2329 fps | 95.9% |
| Vihtavuori N560 | <<locked>> | 96% | 49,197 psi | 79% | 2795 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,028 psi | 59% | 2451 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 38,711 psi | 62% | 2530 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 82% | 24,772 psi | 40% | 2277 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,054 psi | 83% | 2710 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 42,134 psi | 68% | 2572 fps | 95.1% |
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 | Berger Classic Hybrid Hunter. Norma MRP delivers the highest muzzle velocity at 2,927 fps; across all powders the maximum-charge window runs from 1,706 fps to 2,927 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 58–90 %, 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, Hodgdon Superformance rank at the top here: for .300 H&H Mag. with the .308 | 185gr | Berger Classic Hybrid Hunter 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.