Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 165gr | Sierra SBT GameKing 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-17 and ReloadSwiss RS 60.
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% | 54,708 psi | 88% | 2822 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 56,420 psi | 90% | 2884 fps | 98.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,327 psi | 79% | 2854 fps | 98.4% |
| Accurate 4064 | <<locked>> | 86% | 54,998 psi | 88% | 2877 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 55,288 psi | 89% | 2972 fps | 99.9% |
| Accurate High Countryᴾ | <<locked>> | 100% | 53,867 psi | 86% | 3048 fps | 96.1% |
| ADI AR 2206H | <<locked>> | 82% | 54,375 psi | 87% | 2904 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,405 psi | 89% | 2907 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 52,997 psi | 85% | 2949 fps | 96.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,360 psi | 87% | 3025 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 52,968 psi | 85% | 2949 fps | 96.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 55,941 psi | 90% | 2927 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 56,289 psi | 90% | 2953 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 56,188 psi | 90% | 3031 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 53,708 psi | 86% | 3002 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 55,637 psi | 89% | 2995 fps | 97.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 49,226 psi | 79% | 2930 fps | 96.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,441 psi | 74% | 2881 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,596 psi | 65% | 2779 fps | 97.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 52,823 psi | 85% | 3064 fps | 99.8% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,099 psi | 87% | 2917 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 53,243 psi | 85% | 2894 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 49,226 psi | 79% | 2930 fps | 96.1% |
| Bofors RP7 | <<locked>> | 92% | 56,376 psi | 90% | 2923 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 86% | 53,925 psi | 86% | 2907 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 92% | 54,114 psi | 87% | 2966 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 90% | 54,317 psi | 87% | 2927 fps | 97.3% |
| Hodgdon H4895 | <<locked>> | 82% | 54,955 psi | 88% | 2913 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 56,362 psi | 90% | 2953 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 54,984 psi | 88% | 2949 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 54,215 psi | 87% | 3002 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,042 psi | 58% | 1814 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 55,956 psi | 90% | 2913 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 55,361 psi | 89% | 2890 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 54,868 psi | 88% | 2887 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,360 psi | 87% | 2867 fps | 98.4% |
| IMR 4350 | <<locked>> | 94% | 53,722 psi | 86% | 2900 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 90% | 54,650 psi | 88% | 2900 fps | 98.4% |
| IMR 4831 | <<locked>> | 96% | 55,782 psi | 89% | 2963 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 54,244 psi | 87% | 2927 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,375 psi | 87% | 2874 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 53,447 psi | 86% | 2828 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 55,129 psi | 88% | 2887 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 54,592 psi | 88% | 2897 fps | 99.3% |
| Lovex S070 | <<locked>> | 94% | 55,666 psi | 89% | 2936 fps | 98.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,901 psi | 66% | 2697 fps | 96.5% |
| Norma 201 | <<locked>> | 82% | 53,098 psi | 85% | 2848 fps | 100% |
| Norma 202 | <<locked>> | 82% | 53,635 psi | 86% | 2844 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,535 psi | 89% | 2936 fps | 100% |
| Norma 204 | <<locked>> | 94% | 54,201 psi | 87% | 2946 fps | 96.8% |
| Norma MRPᴾ | <<locked>> | 100% | 52,098 psi | 84% | 3018 fps | 98.2% |
| Norma URP | <<locked>> | 94% | 54,186 psi | 87% | 2956 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 86% | 56,318 psi | 90% | 2963 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 52,881 psi | 85% | 2953 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,738 psi | 59% | 1857 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 53,882 psi | 86% | 2890 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 53,563 psi | 86% | 2963 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 53,258 psi | 85% | 2999 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 55,071 psi | 88% | 2995 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 53,925 psi | 86% | 3022 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 84% | 53,635 psi | 86% | 2844 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 53,374 psi | 86% | 2890 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 54,839 psi | 88% | 2923 fps | 95.9% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 54,897 psi | 88% | 2982 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 92% | 56,376 psi | 90% | 2923 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 92% | 54,592 psi | 88% | 2897 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,375 psi | 87% | 2874 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 55,129 psi | 88% | 2887 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,666 psi | 89% | 2936 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 54,868 psi | 88% | 2949 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,405 psi | 89% | 2904 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 56,144 psi | 90% | 2923 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,099 psi | 87% | 2782 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 54,694 psi | 88% | 2782 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,273 psi | 87% | 2844 fps | 98.4% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,389 psi | 87% | 2976 fps | 97.3% |
| Somchem S335 | <<locked>> | 82% | 53,722 psi | 86% | 2779 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,042 psi | 88% | 2890 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 53,461 psi | 86% | 2887 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 52,982 psi | 85% | 2963 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 55,564 psi | 89% | 2959 fps | 98.2% |
| Vihtavuori N133 | <<locked>> | 82% | 54,549 psi | 87% | 2766 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 53,737 psi | 86% | 2808 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 54,157 psi | 87% | 2825 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 54,795 psi | 88% | 2861 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 56,376 psi | 90% | 2953 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 47,848 psi | 77% | 2815 fps | 96.2% |
| Vihtavuori N540 | <<locked>> | 86% | 56,014 psi | 90% | 2871 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 55,550 psi | 89% | 2959 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 51,822 psi | 83% | 2956 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 56,231 psi | 90% | 2923 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 54,360 psi | 87% | 2969 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,727 psi | 67% | 2913 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 56,231 psi | 90% | 2933 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 52,025 psi | 83% | 2890 fps | 96.5% |
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% | 48,051 psi | 77% | 2726 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,267 psi | 74% | 2710 fps | 96% |
| Accurate 3100 | <<locked>> | 92% | 37,536 psi | 60% | 2625 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 45,498 psi | 73% | 2726 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,098 psi | 55% | 2562 fps | 96.1% |
| Accurate High Country | <<locked>> | 98% | 50,183 psi | 80% | 2982 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 50,850 psi | 82% | 2848 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 43,366 psi | 70% | 2694 fps | 99% |
| ADI AR 2209 | <<locked>> | 94% | 46,644 psi | 75% | 2831 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,326 psi | 76% | 2900 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 46,456 psi | 74% | 2828 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,511 psi | 70% | 2720 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,441 psi | 74% | 2785 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 33,852 psi | 54% | 2575 fps | 96.2% |
| Alliant Reloder-17 | 59.8 gr | 80% | 37,927 psi | 61% | 2703 fps | 99% |
| Alliant Reloder-19 | <<locked>> | 94% | 45,861 psi | 74% | 2822 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 98% | 45,934 psi | 74% | 2867 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 84% | 27,949 psi | 45% | 2428 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 96% | 35,882 psi | 58% | 2661 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 88% | 34,418 psi | 55% | 2671 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,647 psi | 81% | 2858 fps | 99.6% |
| Bofors RP3 | <<locked>> | 80% | 43,700 psi | 70% | 2730 fps | 99.8% |
| Bofors RP5 | <<locked>> | 98% | 45,934 psi | 74% | 2867 fps | 95.2% |
| Bofors RP7 | <<locked>> | 84% | 43,918 psi | 70% | 2703 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 44,150 psi | 71% | 2733 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 84% | 41,553 psi | 67% | 2733 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 84% | 44,643 psi | 72% | 2753 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 51,430 psi | 82% | 2858 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,285 psi | 50% | 2474 fps | 97% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,008 psi | 77% | 2838 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 43,729 psi | 70% | 2805 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,905 psi | 43% | 1621 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,385 psi | 79% | 2808 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 51,837 psi | 83% | 2841 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,600 psi | 73% | 2733 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,863 psi | 77% | 2756 fps | 97.2% |
| IMR 4350 | <<locked>> | 86% | 41,756 psi | 67% | 2677 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,190 psi | 64% | 2625 fps | 95% |
| IMR 4831 | <<locked>> | 80% | 33,069 psi | 53% | 2520 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 47,645 psi | 76% | 2815 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 51,010 psi | 82% | 2825 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,241 psi | 81% | 2776 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 45,672 psi | 73% | 2730 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,666 psi | 60% | 2572 fps | 95.8% |
| Lovex S070 | <<locked>> | 84% | 40,611 psi | 65% | 2657 fps | 95.6% |
| Lovex S071 | <<locked>> | 98% | 38,435 psi | 62% | 2644 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 49,864 psi | 80% | 2795 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,386 psi | 81% | 2795 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,818 psi | 73% | 2772 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 47,427 psi | 76% | 2828 fps | 95.2% |
| Norma MRP | <<locked>> | 94% | 42,293 psi | 68% | 2822 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 34,185 psi | 55% | 2562 fps | 96% |
| Ramshot Big Game | <<locked>> | 80% | 46,064 psi | 74% | 2795 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 37,855 psi | 61% | 2657 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,398 psi | 44% | 1660 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,193 psi | 71% | 2713 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,922 psi | 80% | 2904 fps | 99.8% |
| ReloadSwiss RS 60 | 59.8 gr | 80% | 40,350 psi | 65% | 2766 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,895 psi | 54% | 2579 fps | 95.6% |
| ReloadSwiss RS 70 | 62.3 gr | 82% | 35,708 psi | 57% | 2641 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 47,514 psi | 76% | 2746 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 40,973 psi | 66% | 2671 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 96% | 51,445 psi | 82% | 2867 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 96% | 47,877 psi | 77% | 2861 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 84% | 43,918 psi | 70% | 2703 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,666 psi | 60% | 2572 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,010 psi | 82% | 2825 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,672 psi | 73% | 2730 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 40,611 psi | 65% | 2657 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,061 psi | 67% | 2723 fps | 99.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,808 psi | 83% | 2844 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,458 psi | 79% | 2818 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,720 psi | 81% | 2733 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,670 psi | 68% | 2595 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 39,363 psi | 63% | 2572 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 47,427 psi | 76% | 2854 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 50,575 psi | 81% | 2733 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,532 psi | 83% | 2838 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,524 psi | 67% | 2674 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 30,690 psi | 49% | 2513 fps | 98.1% |
| Somchem S385 | <<locked>> | 92% | 42,685 psi | 68% | 2730 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 51,213 psi | 82% | 2720 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,427 psi | 76% | 2717 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,790 psi | 77% | 2726 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,581 psi | 63% | 2605 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 35,520 psi | 57% | 2562 fps | 96.4% |
| Vihtavuori N165 | <<locked>> | 98% | 44,831 psi | 72% | 2759 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 46,180 psi | 74% | 2720 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,157 psi | 56% | 2566 fps | 96% |
| Vihtavuori N555 | <<locked>> | 84% | 30,443 psi | 49% | 2507 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,012 psi | 56% | 2536 fps | 98.4% |
| Winchester 760 | <<locked>> | 84% | 41,553 psi | 67% | 2733 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 88% | 28,079 psi | 45% | 2513 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,211 psi | 79% | 2822 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 48,646 psi | 78% | 2831 fps | 95.6% |
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 | Sierra SBT GameKing. Alliant Reloder-26 delivers the highest muzzle velocity at 3,064 fps; across all powders the maximum-charge window runs from 1,814 fps to 3,064 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 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, Alliant Reloder-19 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-17, ReloadSwiss RS 60 rank at the top here: for .300 H&H Mag. with the .308 | 165gr | Sierra SBT GameKing 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.