Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 170gr | Lapua Lock Base 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, Alliant Reloder-16 and ReloadSwiss RS 70.
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% | 55,419 psi | 89% | 2789 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,476 psi | 86% | 2799 fps | 97.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,386 psi | 81% | 2831 fps | 98.8% |
| Accurate 4064 | <<locked>> | 86% | 55,767 psi | 89% | 2844 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 56,304 psi | 90% | 2943 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 54,853 psi | 88% | 3025 fps | 96.6% |
| ADI AR 2206H | <<locked>> | 82% | 54,955 psi | 88% | 2871 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 56,072 psi | 90% | 2874 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 53,925 psi | 86% | 2927 fps | 97.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,230 psi | 89% | 2995 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 53,679 psi | 86% | 2920 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 53,461 psi | 86% | 2848 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 53,563 psi | 86% | 2864 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 53,548 psi | 86% | 2949 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 54,665 psi | 88% | 2976 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 52,924 psi | 85% | 2910 fps | 97.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,024 psi | 80% | 2907 fps | 96.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,152 psi | 76% | 2851 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,365 psi | 66% | 2762 fps | 97.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,143 psi | 87% | 3045 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,810 psi | 88% | 2884 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 54,027 psi | 87% | 2861 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,024 psi | 80% | 2907 fps | 96.7% |
| Bofors RP7 | <<locked>> | 90% | 53,693 psi | 86% | 2841 fps | 98.1% |
| Hodgdon H380 | <<locked>> | 86% | 54,636 psi | 88% | 2877 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 92% | 55,042 psi | 88% | 2940 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 90% | 55,085 psi | 88% | 2900 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 82% | 55,608 psi | 89% | 2877 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 53,664 psi | 86% | 2871 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 55,753 psi | 89% | 2917 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 55,245 psi | 89% | 2979 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,100 psi | 58% | 1785 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 53,156 psi | 85% | 2828 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,318 psi | 90% | 2858 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,767 psi | 89% | 2861 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,911 psi | 88% | 2838 fps | 98.7% |
| IMR 4350 | <<locked>> | 94% | 54,534 psi | 87% | 2874 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,317 psi | 89% | 2871 fps | 98.7% |
| IMR 4831 | <<locked>> | 94% | 53,214 psi | 85% | 2881 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 54,940 psi | 88% | 2897 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,390 psi | 89% | 2844 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 53,911 psi | 86% | 2792 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 55,796 psi | 89% | 2854 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,332 psi | 89% | 2867 fps | 99.5% |
| Lovex S070 | <<locked>> | 92% | 53,098 psi | 85% | 2854 fps | 98.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,742 psi | 67% | 2677 fps | 97.1% |
| Norma 201 | <<locked>> | 82% | 53,882 psi | 86% | 2815 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,476 psi | 87% | 2815 fps | 100% |
| Norma 203B | <<locked>> | 84% | 52,852 psi | 85% | 2851 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,129 psi | 88% | 2923 fps | 97.3% |
| Norma MRPᴾ | <<locked>> | 100% | 52,997 psi | 85% | 2992 fps | 98.5% |
| Norma URP | <<locked>> | 94% | 55,085 psi | 88% | 2930 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 53,461 psi | 86% | 2877 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 53,853 psi | 86% | 2927 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,796 psi | 59% | 1827 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,592 psi | 88% | 2858 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,317 psi | 87% | 2933 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,186 psi | 87% | 2969 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 56,144 psi | 90% | 2969 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 54,940 psi | 88% | 2995 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 84% | 54,433 psi | 87% | 2815 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,143 psi | 87% | 2858 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,695 psi | 89% | 2897 fps | 96.4% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 55,651 psi | 89% | 2956 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 90% | 53,693 psi | 86% | 2841 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,332 psi | 89% | 2867 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,390 psi | 89% | 2844 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 55,796 psi | 89% | 2854 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 53,098 psi | 85% | 2854 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,695 psi | 89% | 2917 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,115 psi | 90% | 2874 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,447 psi | 86% | 2841 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,810 psi | 88% | 2749 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,535 psi | 89% | 2753 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,998 psi | 88% | 2818 fps | 98.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,143 psi | 88% | 2949 fps | 97.7% |
| Somchem S335 | <<locked>> | 82% | 54,520 psi | 87% | 2749 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,825 psi | 90% | 2861 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,157 psi | 87% | 2854 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 54,056 psi | 87% | 2933 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 56,376 psi | 90% | 2930 fps | 98.5% |
| Vihtavuori N133 | <<locked>> | 82% | 55,303 psi | 89% | 2733 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,607 psi | 88% | 2776 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 54,998 psi | 88% | 2792 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,535 psi | 89% | 2831 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 53,708 psi | 86% | 2871 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,762 psi | 78% | 2792 fps | 96.7% |
| Vihtavuori N540 | <<locked>> | 84% | 53,113 psi | 85% | 2789 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 52,837 psi | 85% | 2874 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,895 psi | 85% | 2933 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 53,490 psi | 86% | 2844 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,230 psi | 89% | 2943 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,612 psi | 68% | 2894 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 53,577 psi | 86% | 2848 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,055 psi | 85% | 2871 fps | 97% |
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% | 48,878 psi | 78% | 2697 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,992 psi | 75% | 2687 fps | 96.5% |
| Accurate 3100 | <<locked>> | 90% | 35,766 psi | 57% | 2549 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 46,267 psi | 74% | 2700 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,780 psi | 56% | 2543 fps | 96.7% |
| Accurate High Country | <<locked>> | 98% | 51,314 psi | 82% | 2963 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 51,663 psi | 83% | 2818 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,816 psi | 70% | 2664 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 94% | 47,398 psi | 76% | 2812 fps | 95.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,008 psi | 77% | 2874 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 47,239 psi | 76% | 2805 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,208 psi | 71% | 2694 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,210 psi | 76% | 2759 fps | 99.7% |
| Alliant Reloder-16 | 55.1 gr | 80% | 34,258 psi | 55% | 2552 fps | 96.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,667 psi | 62% | 2680 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 94% | 46,630 psi | 75% | 2799 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 46,847 psi | 75% | 2848 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 84% | 28,340 psi | 45% | 2408 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 96% | 36,477 psi | 58% | 2641 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 86% | 32,576 psi | 52% | 2585 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,343 psi | 82% | 2828 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 44,280 psi | 71% | 2700 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 46,847 psi | 75% | 2848 fps | 95.8% |
| Bofors RP7 | <<locked>> | 82% | 41,916 psi | 67% | 2625 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 44,730 psi | 72% | 2707 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 82% | 39,349 psi | 63% | 2644 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 84% | 45,440 psi | 73% | 2730 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 52,199 psi | 84% | 2825 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,865 psi | 51% | 2451 fps | 97.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,675 psi | 78% | 2805 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 41,350 psi | 66% | 2720 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,050 psi | 43% | 1598 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,922 psi | 80% | 2776 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 52,707 psi | 85% | 2808 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,064 psi | 74% | 2700 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,544 psi | 78% | 2730 fps | 97.6% |
| IMR 4350 | <<locked>> | 86% | 42,337 psi | 68% | 2654 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,625 psi | 65% | 2598 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 33,547 psi | 54% | 2497 fps | 96.3% |
| IMR 4895 | <<locked>> | 80% | 48,399 psi | 78% | 2789 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 51,677 psi | 83% | 2792 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,937 psi | 82% | 2746 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,412 psi | 74% | 2703 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,247 psi | 61% | 2549 fps | 96.3% |
| Lovex S070 | <<locked>> | 82% | 38,841 psi | 62% | 2579 fps | 95.3% |
| Lovex S071 | <<locked>> | 96% | 36,608 psi | 59% | 2569 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 50,633 psi | 81% | 2766 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,140 psi | 82% | 2766 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,557 psi | 75% | 2746 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 48,211 psi | 77% | 2805 fps | 95.7% |
| Norma MRP | <<locked>> | 92% | 40,248 psi | 65% | 2743 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 34,853 psi | 56% | 2543 fps | 96.6% |
| Ramshot Big Game | <<locked>> | 80% | 46,688 psi | 75% | 2766 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 36,100 psi | 58% | 2579 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,398 psi | 44% | 1631 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,962 psi | 72% | 2690 fps | 97.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,865 psi | 82% | 2877 fps | 99.9% |
| ReloadSwiss RS 60 | 59.4 gr | 80% | 41,118 psi | 66% | 2743 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,461 psi | 55% | 2556 fps | 96.2% |
| ReloadSwiss RS 70 | 60.3 gr | 80% | 33,881 psi | 54% | 2556 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 48,240 psi | 77% | 2717 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,742 psi | 67% | 2648 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 96% | 52,272 psi | 84% | 2841 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 94% | 45,643 psi | 73% | 2779 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 82% | 41,916 psi | 67% | 2625 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,247 psi | 61% | 2549 fps | 96.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,677 psi | 83% | 2792 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,412 psi | 74% | 2703 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 38,841 psi | 62% | 2579 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,859 psi | 69% | 2700 fps | 99.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,489 psi | 84% | 2818 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,256 psi | 81% | 2789 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,387 psi | 82% | 2700 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,294 psi | 69% | 2566 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 39,987 psi | 64% | 2546 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 45,223 psi | 73% | 2776 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 51,242 psi | 82% | 2700 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,199 psi | 84% | 2805 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,221 psi | 68% | 2648 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 31,328 psi | 50% | 2497 fps | 98.6% |
| Somchem S385 | <<locked>> | 90% | 40,727 psi | 65% | 2651 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 51,909 psi | 83% | 2687 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,124 psi | 77% | 2684 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,501 psi | 78% | 2697 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,234 psi | 65% | 2579 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 36,201 psi | 58% | 2543 fps | 97% |
| Vihtavuori N165 | <<locked>> | 96% | 42,583 psi | 68% | 2677 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 46,731 psi | 75% | 2687 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,621 psi | 57% | 2539 fps | 96.5% |
| Vihtavuori N555 | <<locked>> | 84% | 31,154 psi | 50% | 2490 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,491 psi | 57% | 2513 fps | 98.8% |
| Winchester 760 | <<locked>> | 82% | 39,552 psi | 63% | 2651 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,745 psi | 43% | 2431 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,082 psi | 80% | 2795 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 46,108 psi | 74% | 2749 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 | 170gr | Lapua Lock Base. Alliant Reloder-26 delivers the highest muzzle velocity at 3,045 fps; across all powders the maximum-charge window runs from 1,785 fps to 3,045 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 170.0 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-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, Alliant Reloder-16, ReloadSwiss RS 70 rank at the top here: for .300 H&H Mag. with the .308 | 170gr | Lapua Lock Base 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.