Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 165gr | Woodleigh PP SN 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 60, ReloadSwiss RS 70 and Alliant Reloder-16.
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>> | 84% | 55,695 psi | 89% | 2838 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,679 psi | 86% | 2848 fps | 97.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,401 psi | 81% | 2874 fps | 98.7% |
| Accurate 4064 | <<locked>> | 86% | 55,898 psi | 90% | 2890 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 52,707 psi | 85% | 2936 fps | 99.8% |
| Accurate High Countryᴾ | <<locked>> | 100% | 55,216 psi | 89% | 3074 fps | 96.5% |
| ADI AR 2206H | <<locked>> | 82% | 55,172 psi | 88% | 2920 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 56,376 psi | 90% | 2927 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 53,983 psi | 87% | 2972 fps | 97% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,376 psi | 89% | 3045 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,012 psi | 87% | 2969 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 53,577 psi | 86% | 2897 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 53,693 psi | 86% | 2913 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 53,679 psi | 86% | 2995 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 54,926 psi | 88% | 3025 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 53,272 psi | 85% | 2959 fps | 97% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,169 psi | 80% | 2953 fps | 96.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,500 psi | 76% | 2900 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,379 psi | 66% | 2802 fps | 97.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,389 psi | 87% | 3094 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,013 psi | 88% | 2933 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 54,317 psi | 87% | 2913 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,169 psi | 80% | 2953 fps | 96.5% |
| Bofors RP7 | <<locked>> | 90% | 53,853 psi | 86% | 2887 fps | 98% |
| Hodgdon H380 | <<locked>> | 86% | 54,650 psi | 88% | 2923 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 92% | 55,216 psi | 89% | 2989 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 90% | 55,172 psi | 88% | 2949 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 82% | 55,796 psi | 89% | 2930 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 53,983 psi | 87% | 2920 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 55,753 psi | 89% | 2963 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 55,419 psi | 89% | 3025 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,100 psi | 58% | 1821 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 53,359 psi | 86% | 2877 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,376 psi | 90% | 2910 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,608 psi | 89% | 2904 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,027 psi | 88% | 2884 fps | 98.6% |
| IMR 4350 | <<locked>> | 94% | 54,520 psi | 87% | 2920 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,506 psi | 89% | 2917 fps | 98.6% |
| IMR 4831 | <<locked>> | 94% | 53,229 psi | 85% | 2927 fps | 99.8% |
| IMR 4895 | <<locked>> | 84% | 55,056 psi | 88% | 2943 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,448 psi | 89% | 2894 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,186 psi | 87% | 2844 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 55,898 psi | 90% | 2900 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,463 psi | 89% | 2913 fps | 99.4% |
| Lovex S070 | <<locked>> | 92% | 53,214 psi | 85% | 2897 fps | 98.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,901 psi | 67% | 2720 fps | 96.9% |
| Norma 201 | <<locked>> | 82% | 53,954 psi | 87% | 2861 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,491 psi | 87% | 2861 fps | 100% |
| Norma 203B | <<locked>> | 84% | 52,997 psi | 85% | 2900 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,259 psi | 89% | 2969 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 53,345 psi | 86% | 3041 fps | 98.5% |
| Norma URP | <<locked>> | 94% | 55,100 psi | 88% | 2976 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 53,635 psi | 86% | 2927 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 53,954 psi | 87% | 2972 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,767 psi | 59% | 1864 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,752 psi | 88% | 2907 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,433 psi | 87% | 2982 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,534 psi | 87% | 3022 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 56,202 psi | 90% | 3012 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 54,969 psi | 88% | 3041 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 54,462 psi | 87% | 2864 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,172 psi | 87% | 2907 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,869 psi | 90% | 2943 fps | 96.2% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 55,956 psi | 90% | 3002 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 90% | 53,853 psi | 86% | 2887 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,463 psi | 89% | 2913 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,448 psi | 89% | 2894 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 55,898 psi | 90% | 2900 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 53,214 psi | 85% | 2897 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,796 psi | 89% | 2966 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,347 psi | 90% | 2923 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,534 psi | 86% | 2887 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,708 psi | 88% | 2795 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,695 psi | 89% | 2799 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,317 psi | 89% | 2867 fps | 98.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,448 psi | 89% | 2995 fps | 97.5% |
| Somchem S335 | <<locked>> | 82% | 54,520 psi | 87% | 2795 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,999 psi | 90% | 2910 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,215 psi | 87% | 2900 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 54,273 psi | 87% | 2982 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 53,171 psi | 85% | 2923 fps | 97.9% |
| Vihtavuori N133 | <<locked>> | 82% | 55,158 psi | 88% | 2779 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,665 psi | 88% | 2825 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,187 psi | 88% | 2841 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,680 psi | 89% | 2877 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 53,809 psi | 86% | 2917 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,791 psi | 78% | 2835 fps | 96.6% |
| Vihtavuori N540 | <<locked>> | 84% | 53,417 psi | 86% | 2838 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 53,069 psi | 85% | 2923 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,982 psi | 85% | 2976 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 53,548 psi | 86% | 2887 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,216 psi | 89% | 2989 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,714 psi | 68% | 2940 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 53,606 psi | 86% | 2894 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,200 psi | 85% | 2913 fps | 96.8% |
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% | 49,023 psi | 79% | 2743 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,905 psi | 75% | 2730 fps | 96.3% |
| Accurate 3100 | <<locked>> | 92% | 38,348 psi | 61% | 2644 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 46,383 psi | 74% | 2746 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,853 psi | 56% | 2582 fps | 96.5% |
| Accurate High Country | <<locked>> | 98% | 51,474 psi | 83% | 3009 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 51,677 psi | 83% | 2864 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,918 psi | 70% | 2710 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 94% | 47,369 psi | 76% | 2851 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,066 psi | 77% | 2920 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 47,413 psi | 76% | 2851 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,295 psi | 71% | 2736 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,253 psi | 76% | 2805 fps | 99.6% |
| Alliant Reloder-16 | 56.5 gr | 80% | 34,360 psi | 55% | 2592 fps | 96.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,783 psi | 62% | 2723 fps | 99.2% |
| Alliant Reloder-19 | <<locked>> | 94% | 46,804 psi | 75% | 2841 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 47,079 psi | 75% | 2894 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 84% | 28,471 psi | 46% | 2448 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 96% | 36,608 psi | 59% | 2684 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 88% | 35,099 psi | 56% | 2690 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,372 psi | 82% | 2874 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 44,512 psi | 71% | 2746 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 47,079 psi | 75% | 2894 fps | 95.7% |
| Bofors RP7 | <<locked>> | 82% | 41,959 psi | 67% | 2664 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 44,889 psi | 72% | 2753 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 82% | 39,450 psi | 63% | 2687 fps | 95% |
| Hodgdon H4350 | <<locked>> | 84% | 45,513 psi | 73% | 2772 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 52,286 psi | 84% | 2874 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,821 psi | 51% | 2490 fps | 97.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,791 psi | 78% | 2851 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 41,408 psi | 66% | 2759 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,093 psi | 43% | 1631 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,951 psi | 80% | 2822 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 52,852 psi | 85% | 2861 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,180 psi | 74% | 2746 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,559 psi | 78% | 2772 fps | 97.5% |
| IMR 4350 | <<locked>> | 86% | 42,380 psi | 68% | 2697 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,683 psi | 65% | 2641 fps | 95.3% |
| IMR 4831 | <<locked>> | 80% | 33,620 psi | 54% | 2536 fps | 96.1% |
| IMR 4895 | <<locked>> | 80% | 48,486 psi | 78% | 2835 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 51,851 psi | 83% | 2841 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,821 psi | 81% | 2789 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,296 psi | 74% | 2746 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,334 psi | 61% | 2592 fps | 96.2% |
| Lovex S070 | <<locked>> | 82% | 38,827 psi | 62% | 2618 fps | 95% |
| Lovex S071 | <<locked>> | 96% | 36,753 psi | 59% | 2608 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 50,720 psi | 81% | 2812 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,227 psi | 82% | 2812 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,630 psi | 75% | 2792 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 48,225 psi | 77% | 2848 fps | 95.5% |
| Norma MRP | <<locked>> | 92% | 40,379 psi | 65% | 2785 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 34,911 psi | 56% | 2582 fps | 96.3% |
| Ramshot Big Game | <<locked>> | 80% | 46,775 psi | 75% | 2812 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 38,682 psi | 62% | 2680 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,398 psi | 44% | 1667 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,063 psi | 72% | 2736 fps | 97.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,836 psi | 82% | 2923 fps | 99.8% |
| ReloadSwiss RS 60 | 60.9 gr | 80% | 41,234 psi | 66% | 2789 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,577 psi | 55% | 2598 fps | 96% |
| ReloadSwiss RS 70 | 63.4 gr | 82% | 36,419 psi | 58% | 2664 fps | 96% |
| Rottweil R 902 | <<locked>> | 80% | 48,153 psi | 77% | 2762 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,814 psi | 67% | 2690 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 96% | 52,214 psi | 84% | 2884 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 94% | 45,847 psi | 74% | 2825 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 82% | 41,959 psi | 67% | 2664 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,334 psi | 61% | 2592 fps | 96.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,851 psi | 83% | 2841 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,296 psi | 74% | 2746 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 38,827 psi | 62% | 2618 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,786 psi | 69% | 2740 fps | 99.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,779 psi | 85% | 2867 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,198 psi | 80% | 2835 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,576 psi | 83% | 2749 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,468 psi | 70% | 2612 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 39,972 psi | 64% | 2589 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 45,411 psi | 73% | 2822 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 51,358 psi | 82% | 2749 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,228 psi | 84% | 2851 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,322 psi | 68% | 2690 fps | 99.5% |
| Somchem S365 | <<locked>> | 80% | 31,386 psi | 50% | 2533 fps | 98.4% |
| Somchem S385 | <<locked>> | 92% | 43,642 psi | 70% | 2753 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 52,112 psi | 84% | 2736 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,356 psi | 78% | 2733 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,573 psi | 78% | 2743 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,292 psi | 65% | 2621 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 36,216 psi | 58% | 2582 fps | 96.7% |
| Vihtavuori N165 | <<locked>> | 98% | 45,745 psi | 73% | 2779 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 46,949 psi | 75% | 2736 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,810 psi | 57% | 2582 fps | 96.4% |
| Vihtavuori N555 | <<locked>> | 84% | 31,125 psi | 50% | 2526 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,549 psi | 57% | 2556 fps | 98.7% |
| Winchester 760 | <<locked>> | 82% | 39,653 psi | 64% | 2694 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 88% | 28,660 psi | 46% | 2536 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,198 psi | 80% | 2841 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 46,195 psi | 74% | 2792 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 | 165gr | Woodleigh PP SN. Alliant Reloder-26 delivers the highest muzzle velocity at 3,094 fps; across all powders the maximum-charge window runs from 1,821 fps to 3,094 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 165.0 gr projectile in 0.308" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, Alliant Reloder-22 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 60, ReloadSwiss RS 70, Alliant Reloder-16 rank at the top here: for .300 H&H Mag. with the .308 | 165gr | Woodleigh PP SN 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.