Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 180gr | Berger Elite Hunter bullet and 96 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.
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% | 55,941 psi | 90% | 2707 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,766 psi | 86% | 2720 fps | 98.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,517 psi | 81% | 2753 fps | 99% |
| Accurate 4064 | <<locked>> | 86% | 56,101 psi | 90% | 2759 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 52,779 psi | 85% | 2808 fps | 99.9% |
| Accurate High Countryᴾ | <<locked>> | 100% | 55,056 psi | 88% | 2943 fps | 97% |
| ADI AR 2206H | <<locked>> | 82% | 55,187 psi | 88% | 2782 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 52,939 psi | 85% | 2740 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 53,896 psi | 86% | 2841 fps | 97.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,434 psi | 89% | 2910 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,563 psi | 87% | 2854 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 53,592 psi | 86% | 2762 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 53,867 psi | 86% | 2785 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 53,664 psi | 86% | 2861 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 54,998 psi | 88% | 2890 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 53,171 psi | 85% | 2831 fps | 97.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,169 psi | 80% | 2828 fps | 97.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,384 psi | 76% | 2772 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,452 psi | 66% | 2687 fps | 98.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,288 psi | 87% | 2963 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,187 psi | 88% | 2802 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 45,992 psi | 74% | 2753 fps | 95.9% |
| Bofors RP3 | <<locked>> | 86% | 54,346 psi | 87% | 2779 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,169 psi | 80% | 2828 fps | 97.1% |
| Bofors RP7 | <<locked>> | 90% | 53,780 psi | 86% | 2759 fps | 98.4% |
| Hodgdon H380 | <<locked>> | 86% | 54,752 psi | 88% | 2792 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 92% | 55,288 psi | 89% | 2858 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 90% | 55,129 psi | 88% | 2815 fps | 98.1% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 55,593 psi | 89% | 2841 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 82% | 55,782 psi | 89% | 2792 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 53,838 psi | 86% | 2789 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 55,854 psi | 90% | 2828 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 55,274 psi | 89% | 2894 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,216 psi | 58% | 1722 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 53,563 psi | 86% | 2746 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,753 psi | 89% | 2772 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,303 psi | 89% | 2759 fps | 99% |
| IMR 4350 | <<locked>> | 94% | 54,491 psi | 87% | 2789 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,448 psi | 89% | 2785 fps | 98.9% |
| IMR 4831 | <<locked>> | 94% | 53,432 psi | 86% | 2802 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,259 psi | 89% | 2812 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,477 psi | 89% | 2759 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,201 psi | 87% | 2710 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,086 psi | 90% | 2769 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,550 psi | 89% | 2785 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 53,359 psi | 86% | 2772 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,959 psi | 67% | 2605 fps | 97.5% |
| Norma 201 | <<locked>> | 82% | 53,969 psi | 87% | 2730 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,621 psi | 88% | 2726 fps | 100% |
| Norma 203B | <<locked>> | 84% | 53,156 psi | 85% | 2769 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,332 psi | 89% | 2841 fps | 97.7% |
| Norma MRPᴾ | <<locked>> | 100% | 53,185 psi | 85% | 2913 fps | 98.9% |
| Norma URP | <<locked>> | 94% | 55,259 psi | 89% | 2844 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 53,650 psi | 86% | 2795 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 54,056 psi | 87% | 2848 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,767 psi | 59% | 1762 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,781 psi | 88% | 2779 fps | 99.3% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,781 psi | 88% | 2851 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,360 psi | 87% | 2881 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 56,231 psi | 90% | 2881 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,085 psi | 88% | 2913 fps | 100% |
| Rottweil R 902 | <<locked>> | 84% | 54,563 psi | 87% | 2730 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,447 psi | 87% | 2776 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,840 psi | 90% | 2818 fps | 96.8% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,057 psi | 90% | 2874 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 90% | 53,780 psi | 86% | 2759 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,550 psi | 89% | 2785 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,477 psi | 89% | 2759 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,086 psi | 90% | 2769 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 53,359 psi | 86% | 2772 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,985 psi | 90% | 2835 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,766 psi | 86% | 2759 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,926 psi | 88% | 2664 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,796 psi | 89% | 2667 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,405 psi | 89% | 2740 fps | 99% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,550 psi | 89% | 2871 fps | 98.1% |
| Somchem S335 | <<locked>> | 82% | 54,534 psi | 87% | 2661 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,144 psi | 90% | 2779 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,331 psi | 87% | 2769 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 54,172 psi | 87% | 2848 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 52,968 psi | 85% | 2795 fps | 98.3% |
| Vihtavuori N133 | <<locked>> | 82% | 55,434 psi | 89% | 2648 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,911 psi | 88% | 2694 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,274 psi | 89% | 2707 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,666 psi | 89% | 2746 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 53,838 psi | 86% | 2789 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,892 psi | 78% | 2717 fps | 97.2% |
| Vihtavuori N540 | <<locked>> | 84% | 53,330 psi | 86% | 2703 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 53,069 psi | 85% | 2792 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,939 psi | 85% | 2848 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 53,693 psi | 86% | 2897 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 53,577 psi | 86% | 2762 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,288 psi | 89% | 2858 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,714 psi | 68% | 2818 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 53,824 psi | 86% | 2766 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,084 psi | 85% | 2789 fps | 97.4% |
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% | 49,081 psi | 79% | 2615 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,036 psi | 75% | 2608 fps | 96.9% |
| Accurate 3100 | <<locked>> | 90% | 35,955 psi | 58% | 2480 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 46,499 psi | 75% | 2618 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,070 psi | 56% | 2474 fps | 97.2% |
| Accurate High Country | <<locked>> | 96% | 47,877 psi | 77% | 2822 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 51,953 psi | 83% | 2736 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,135 psi | 71% | 2592 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 44,469 psi | 71% | 2674 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,138 psi | 77% | 2792 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 45,020 psi | 72% | 2690 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,411 psi | 71% | 2615 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,471 psi | 76% | 2680 fps | 99.8% |
| Alliant Reloder-16 | 53 gr | 80% | 34,563 psi | 55% | 2487 fps | 97.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,754 psi | 62% | 2605 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 43,888 psi | 70% | 2667 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,092 psi | 71% | 2713 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,803 psi | 43% | 2297 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,287 psi | 55% | 2516 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 86% | 32,706 psi | 52% | 2520 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,547 psi | 83% | 2749 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 43,265 psi | 69% | 2697 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 44,614 psi | 72% | 2625 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 44,092 psi | 71% | 2713 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 39,508 psi | 63% | 2497 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 45,078 psi | 72% | 2635 fps | 99% |
| Hodgdon H414 | <<locked>> | 82% | 39,653 psi | 64% | 2579 fps | 95.9% |
| Hodgdon H4350 | <<locked>> | 82% | 42,685 psi | 68% | 2595 fps | 95.3% |
| Hodgdon H4831 | <<locked>> | 98% | 51,880 psi | 83% | 2782 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 52,504 psi | 84% | 2743 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,010 psi | 51% | 2385 fps | 98% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,950 psi | 78% | 2726 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 41,495 psi | 67% | 2648 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,006 psi | 43% | 1535 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,154 psi | 80% | 2694 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,412 psi | 74% | 2625 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,631 psi | 78% | 2648 fps | 98% |
| IMR 4350 | <<locked>> | 84% | 39,987 psi | 64% | 2526 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,814 psi | 65% | 2526 fps | 96% |
| IMR 4831 | <<locked>> | 80% | 33,779 psi | 54% | 2431 fps | 96.9% |
| IMR 4895 | <<locked>> | 80% | 48,704 psi | 78% | 2710 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 51,924 psi | 83% | 2710 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,039 psi | 82% | 2664 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,572 psi | 75% | 2621 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,377 psi | 62% | 2477 fps | 96.8% |
| Lovex S070 | <<locked>> | 80% | 36,651 psi | 59% | 2457 fps | 95% |
| Lovex S071 | <<locked>> | 94% | 34,563 psi | 55% | 2451 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 50,792 psi | 81% | 2680 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,401 psi | 82% | 2680 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,876 psi | 75% | 2667 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 45,208 psi | 72% | 2671 fps | 95.4% |
| Norma MRP | <<locked>> | 92% | 40,553 psi | 65% | 2674 fps | 96% |
| Norma URP | <<locked>> | 80% | 35,070 psi | 56% | 2474 fps | 97.1% |
| Ramshot Big Game | <<locked>> | 80% | 46,833 psi | 75% | 2687 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 36,361 psi | 58% | 2513 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,557 psi | 44% | 1575 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,165 psi | 72% | 2615 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,140 psi | 82% | 2795 fps | 100% |
| ReloadSwiss RS 60 | 57 gr | 80% | 41,205 psi | 66% | 2664 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,737 psi | 56% | 2490 fps | 96.8% |
| ReloadSwiss RS 70 | 57.9 gr | 80% | 33,997 psi | 55% | 2490 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 48,312 psi | 77% | 2635 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,959 psi | 67% | 2572 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 49,182 psi | 79% | 2710 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 92% | 42,975 psi | 69% | 2651 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 39,508 psi | 63% | 2497 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,377 psi | 62% | 2477 fps | 96.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,924 psi | 83% | 2710 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,572 psi | 75% | 2621 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,651 psi | 59% | 2457 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,062 psi | 69% | 2621 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,444 psi | 81% | 2707 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,634 psi | 83% | 2618 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,526 psi | 70% | 2490 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,579 psi | 60% | 2421 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 42,569 psi | 68% | 2644 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 51,445 psi | 82% | 2618 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,417 psi | 84% | 2723 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,395 psi | 68% | 2572 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 31,560 psi | 51% | 2428 fps | 99% |
| Somchem S385 | <<locked>> | 90% | 40,785 psi | 65% | 2579 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 52,156 psi | 84% | 2602 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,399 psi | 78% | 2602 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,747 psi | 78% | 2615 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,451 psi | 65% | 2507 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,448 psi | 58% | 2474 fps | 97.5% |
| Vihtavuori N165 | <<locked>> | 96% | 42,888 psi | 69% | 2608 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 47,094 psi | 76% | 2608 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,955 psi | 58% | 2474 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 82% | 29,211 psi | 47% | 2369 fps | 95.6% |
| Vihtavuori N560 | <<locked>> | 98% | 50,227 psi | 81% | 2838 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,636 psi | 57% | 2444 fps | 99.1% |
| Winchester 760 | <<locked>> | 80% | 37,246 psi | 60% | 2523 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,963 psi | 43% | 2382 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,183 psi | 80% | 2710 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 43,250 psi | 69% | 2621 fps | 95% |
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 96 powders for .300 H&H Mag. loaded with the .308 | 180gr | Berger Elite Hunter. Alliant Reloder-26 delivers the highest muzzle velocity at 2,963 fps; across all powders the maximum-charge window runs from 1,722 fps to 2,963 fps. Accurate 3100 gives the best case fill at 100 %, and 96 of the 96 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 180.0 gr projectile in 0.308" calls for a 1:11.5 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 | 180gr | Berger Elite 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.